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java算术测试界面代码 java算术测试界面代码有哪些
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用java编写程序 课题：算术运算测试
你好，按照你的要求代码如下，可以直接运行
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class test {
public static void main(String[] args) {
int count = 0;
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
for (int i = 0; i 10; i++) {
int a = (int) (Math.random() * 100);
int b = (int) (Math.random() * 100);
int c = (int) (Math.random() * 2);
int r = 0;
switch (c) {
case 0:
if (a + b = 100) {
a = 100 - b;
}
System.out.print(a + " + " + b + " = ");
r = a + b;
break;
case 1:
if (a b) {
int t = a;
a = b;
b = t;
}
System.out.print(a + " - " + b + " = ");
r = a - b;
}
int input;
try {
input = Integer.valueOf(in.readLine());
} catch (Exception e1) {
System.out.println("答案错误\n");
continue;
}
if (input == r) {
count++;
System.out.println("答案正确\n");
} else {
System.out.println("答案错误\n");
}
}
if (null != in) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("答对数量：" + count + "\n得分: " + count * 10);
}
}
相关问答
Q1: 求一计算器java代码，最好简单一点（图形界面）
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import javax.swing.*;
public class Counter extends Frame
{
//声明三个面板的布局
GridLayout gl1,gl2,gl3;
Panel p0,p1,p2,p3;
JTextField tf1;
TextField tf2;
Button b0,b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16,b17,b18,b19,b20,b21,b22,b23,b24,b25,b26;
StringBuffer str;//显示屏所显示的字符串
double x,y;//x和y都是运算数
int z;//Z表示单击了那一个运算符.0表示"+",1表示"-",2表示"*",3表示"/"
static double m;//记忆的数字
public Counter()
{
gl1=new GridLayout(1,4,10,0);//实例化三个面板的布局
gl2=new GridLayout(4,1,0,15);
gl3=new GridLayout(4,5,10,15);
tf1=new JTextField(27);//显示屏
tf1.setHorizontalAlignment(JTextField.RIGHT);
tf1.setEnabled(false);
tf1.setText("0");
tf2=new TextField(10);//显示记忆的索引值
tf2.setEditable(false);
//实例化所有按钮、设置其前景色并注册监听器
b0=new Button("Backspace");
b0.setForeground(Color.red);
b0.addActionListener(new Bt());
b1=new Button("CE");
b1.setForeground(Color.red);
b1.addActionListener(new Bt());
b2=new Button("C");
b2.setForeground(Color.red);
b2.addActionListener(new Bt());
b3=new Button("MC");
b3.setForeground(Color.red);
b3.addActionListener(new Bt());
b4=new Button("MR");
b4.setForeground(Color.red);
b4.addActionListener(new Bt());
b5=new Button("MS");
b5.setForeground(Color.red);
b5.addActionListener(new Bt());
b6=new Button("M+");
b6.setForeground(Color.red);
b6.addActionListener(new Bt());
b7=new Button("7");
b7.setForeground(Color.blue);
b7.addActionListener(new Bt());
b8=new Button("8");
b8.setForeground(Color.blue);
b8.addActionListener(new Bt());
b9=new Button("9");
b9.setForeground(Color.blue);
b9.addActionListener(new Bt());
b10=new Button("/");
b10.setForeground(Color.red);
b10.addActionListener(new Bt());
b11=new Button("sqrt");
b11.setForeground(Color.blue);
b11.addActionListener(new Bt());
b12=new Button("4");
b12.setForeground(Color.blue);
b12.addActionListener(new Bt());
b13=new Button("5");
b13.setForeground(Color.blue);
b13.addActionListener(new Bt());
b14=new Button("6");
b14.setForeground(Color.blue);
b14.addActionListener(new Bt());
b15=new Button("*");
b15.setForeground(Color.red);
b15.addActionListener(new Bt());
b16=new Button("%");
b16.setForeground(Color.blue);
b16.addActionListener(new Bt());
b17=new Button("1");
b17.setForeground(Color.blue);
b17.addActionListener(new Bt());
b18=new Button("2");
b18.setForeground(Color.blue);
b18.addActionListener(new Bt());
b19=new Button("3");
b19.setForeground(Color.blue);
b19.addActionListener(new Bt());
b20=new Button("-");
b20.setForeground(Color.red);
b20.addActionListener(new Bt());
b21=new Button("1/X");
b21.setForeground(Color.blue);
b21.addActionListener(new Bt());
b22=new Button("0");
b22.setForeground(Color.blue);
b22.addActionListener(new Bt());
b23=new Button("+/-");
b23.setForeground(Color.blue);
b23.addActionListener(new Bt());
b24=new Button(".");
b24.setForeground(Color.blue);
b24.addActionListener(new Bt());
b25=new Button("+");
b25.setForeground(Color.red);
b25.addActionListener(new Bt());
b26=new Button("=");
b26.setForeground(Color.red);
b26.addActionListener(new Bt());
//实例化四个面板
p0=new Panel();
p1=new Panel();
p2=new Panel();
p3=new Panel();
//创建一个空字符串缓冲区
str=new StringBuffer();
//添加面板p0中的组件和设置其在框架中的位置和大小
p0.add(tf1);
p0.setBounds(10,25,300,40);
//添加面板p1中的组件和设置其在框架中的位置和大小
p1.setLayout(gl1);
p1.add(tf2);
p1.add(b0);
p1.add(b1);
p1.add(b2);
p1.setBounds(10,65,300,25);
//添加面板p2中的组件并设置其的框架中的位置和大小
p2.setLayout(gl2);
p2.add(b3);
p2.add(b4);
p2.add(b5);
p2.add(b6);
p2.setBounds(10,110,40,150);
//添加面板p3中的组件并设置其在框架中的位置和大小
p3.setLayout(gl3);//设置p3的布局
p3.add(b7);
p3.add(b8);
p3.add(b9);
p3.add(b10);
p3.add(b11);
p3.add(b12);
p3.add(b13);
p3.add(b14);
p3.add(b15);
p3.add(b16);
p3.add(b17);
p3.add(b18);
p3.add(b19);
p3.add(b20);
p3.add(b21);
p3.add(b22);
p3.add(b23);
p3.add(b24);
p3.add(b25);
p3.add(b26);
p3.setBounds(60,110,250,150);
//设置框架中的布局为空布局并添加4个面板
setLayout(null);
add(p0);
add(p1);
add(p2);
add(p3);
setResizable(false);//禁止调整框架的大小
//匿名类关闭窗口
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e1)
{
System.exit(0);
}
});
setBackground(Color.lightGray);
setBounds(100,100,320,280);
setVisible(true);
}
//构造监听器
class Bt implements ActionListener
{
public void actionPerformed(ActionEvent e2)
{
try{
if(e2.getSource()==b1)//选择"CE"清零
{
tf1.setText("0");//把显示屏清零
str.setLength(0);//清空字符串缓冲区以准备接收新的输入运算数
}
else if(e2.getSource()==b2)//选择"C"清零
{
tf1.setText("0");//把显示屏清零
str.setLength(0);
}
else if(e2.getSource()==b23)//单击"+/-"选择输入的运算数是正数还是负数
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(-x));
}
else if(e2.getSource()==b25)//单击加号按钮获得x的值和z的值并清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);//清空缓冲区以便接收新的另一个运算数
y=0d;
z=0;
}
else if(e2.getSource()==b20)//单击减号按钮获得x的值和z的值并清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=1;
}
else if(e2.getSource()==b15)//单击乘号按钮获得x的值和z的值并清空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=2;
}
else if(e2.getSource()==b10)//单击除号按钮获得x的值和z的值并空y的值
{
x=Double.parseDouble(tf1.getText().trim());
str.setLength(0);
y=0d;
z=3;
}
else if(e2.getSource()==b26)//单击等号按钮输出计算结果
{
str.setLength(0);
switch(z)
{
case 0 : tf1.setText(""+(x+y));break;
case 1 : tf1.setText(""+(x-y));break;
case 2 : tf1.setText(""+(x*y));break;
case 3 : tf1.setText(""+(x/y));break;
}
}
else if(e2.getSource()==b24)//单击"."按钮输入小数
{
if(tf1.getText().trim().indexOf(′.′)!=-1)//判断字符串中是否已经包含了小数点
{
}
else//如果没数点有小
{
if(tf1.getText().trim().equals("0"))//如果初时显示为0
{
str.setLength(0);
tf1.setText((str.append("0"+e2.getActionCommand())).toString());
}
else if(tf1.getText().trim().equals(""))//如果初时显示为空则不做任何操作
{
}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
}
}
y=0d;
}
else if(e2.getSource()==b11)//求平方根
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText("数字格式异常");
if(x0)
tf1.setText("负数没有平方根");
else
tf1.setText(""+Math.sqrt(x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b16)//单击了"%"按钮
{
x=Double.parseDouble(tf1.getText().trim());
tf1.setText(""+(0.01*x));
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b21)//单击了"1/X"按钮
{
x=Double.parseDouble(tf1.getText().trim());
if(x==0)
{
tf1.setText("除数不能为零");
}
else
{
tf1.setText(""+(1/x));
}
str.setLength(0);
y=0d;
}
else if(e2.getSource()==b3)//MC为清除内存
{
m=0d;
tf2.setText("");
str.setLength(0);
}
else if(e2.getSource()==b4)//MR为重新调用存储的数据
{
if(tf2.getText().trim()!="")//有记忆数字
{
tf1.setText(""+m);
}
}
else if(e2.getSource()==b5)//MS为存储显示的数据
{
m=Double.parseDouble(tf1.getText().trim());
tf2.setText("M");
tf1.setText("0");
str.setLength(0);
}
else if(e2.getSource()==b6)//M+为将显示的数字与已经存储的数据相加要查看新的数字单击MR
{
m=m+Double.parseDouble(tf1.getText().trim());
}
else//选择的是其他的按钮
{
if(e2.getSource()==b22)//如果选择的是"0"这个数字键
{
if(tf1.getText().trim().equals("0"))//如果显示屏显示的为零不做操作
{
}
else
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
else if(e2.getSource()==b0)//选择的是“BackSpace”按钮
{
if(!tf1.getText().trim().equals("0"))//如果显示屏显示的不是零
{
if(str.length()!=1)
{
tf1.setText(str.delete(str.length()-1,str.length()).toString());//可能抛出字符串越界异常
}
else
{
tf1.setText("0");
str.setLength(0);
}
}
y=Double.parseDouble(tf1.getText().trim());
}
else//其他的数字键
{
tf1.setText(str.append(e2.getActionCommand()).toString());
y=Double.parseDouble(tf1.getText().trim());
}
}
}
catch(NumberFormatException e){
tf1.setText("数字格式异常");
}
catch(StringIndexOutOfBoundsException e){
tf1.setText("字符串索引越界");
}
}
}
public static void main(String args[])
{
new Counter();
}
}
Q2: 急求！！！如何用java程序代码实现计算器界面
package jisuanqi_new;
import java.awt.*;
import java.awt.event.*;
public class JiSuanQi_new implements ActionListener
{
Panel p1;//声明面板p1
TextField t1;//声明文本行t1
String[] label = {"7","8","9","/","4","5","6","*","1","2","3","-","0",".","=","+"};//声明标签数组label1存放按钮上的标签
Button[] b;//声明按钮数组存放16个按钮
private int i;//声明i以备后用
private String op1 = "0";//运算数备用
private String operator = "+";//运算符备用
private boolean append = false;//备用
public JiSuanQi_new()//构造方法
{
t1=new TextField();//初始化文本行t1
b = new Button[label.length];//初始化按钮数组b
p1=new Panel();//初始化面板p1
p1.setLayout(new GridLayout(4,4,4,4));//使面板选择网格布局管理器以备储存16个按钮（4行4列）
for(int i=0;ib.length;i++)//利用for循环把标签放在按钮上，使每个按钮添加事件监听器，在面板p1上添加上16个按钮
{
b[i] = new Button(label[i]);//把标签依次放在16个按钮上
b[i].addActionListener(this);//使每个按钮添加动作事件监听器
p1.add(b[i]); //分别将按钮添加到面板p1上
}
Frame f=new Frame("计算器1.0");//初始化窗口f,起名字计算器1.0
f.setLayout(new BorderLayout());//为窗口选择边界布局管理器
f.add(BorderLayout.NORTH,t1);//把文本行他添加到窗口的北部
f.add(BorderLayout.CENTER,p1);//把面吧p1添加到窗口的中间
f.addWindowListener(new WindowAdapter(){//给窗口f添加窗口事件监听器
public void windowClosing(WindowEvent eve){//运行窗口关闭方法
System.exit(0);//退出程序
}
});
f.setSize(250, 250);//设置窗口大小
f.setLocation(200,200);
f.setVisible(true);//显示窗口
}
public static void main(String args[])
{
new JiSuanQi_new(); //调用构造方法
}
public void actionPerformed(ActionEvent ae)
{//按钮被操作发生
String comm = ae.getActionCommand();//返回与此动作相关的命令字符串，即：使用者第一次点击的按钮是什么。
if("0123456789".indexOf(comm)!=-1)//如果相关命令字符串为0~9之间的数字则执行
{
if(append){
String temp = t1.getText();//新数字
t1.setText(temp+comm);
}else{ //因为此时append为false执行这个
t1.setText(comm); //将文本行t1设置为相关命令字符串（你按中的按钮代码）
append = true;//此时append=true若继续按按钮若继续按数字的话1.第一次的按话不会改变2.非第一次按得话会覆盖之前按得数字（即缺点：只能进行单个数字的计算）
}
}
else if(("+-*/".indexOf(comm)!=-1))//如果相关命令字符串为+-*/之间的数字则执行
{
//保存
//t1.setText(comm);
op1 = t1.getText();//把第一个数赋值给op1
operator = comm;//把命令字符串赋值给operator
append = false;//此时append为false即若继续按按钮若按数字的话将重复上面的动作，按符号的话将覆盖之前的符号
}
else if("=".equals(comm))//如果按的是=号，则按条件进行下面的运算
{
String op2 = t1.getText();//op2第二个数
double d1 = Double.parseDouble(op1);
double d2 = Double.parseDouble(op2);
if(operator.equals("+")){
d1 = d1 + d2 ;
}else if(operator.equals("-")){
d1 = d1 - d2;
}else if(operator.equals("*")){
d1 = d1 * d2;
}else {
d1 = d1 / d2;
}
t1.setText(d1+"");//显示计算结果
append = false;
}
else if(".".equals(comm))//若是.号继续按
{
String temp = t1.getText();
if(temp.indexOf(".")==-1){
t1.setText(temp+".");
append = true;
}
}
}
}
Q3: java课程设计“小学算术运算测试程序”
花了好几个小时,测试通过,希望楼主多给点分
import java.util.Scanner;
class Question{
private int firstParam;
private int secondParam;
private String operator;
private int answer;
private int score;
public int getFirstParam() {
return firstParam;
}
public void setFirstParam(int firstParam) {
this.firstParam = firstParam;
}
public int getSecondParam() {
return secondParam;
}
public void setSecondParam(int secondParam) {
this.secondParam = secondParam;
}
public String getOperator() {
return operator;
}
public void setOperator(String operator) {
this.operator = operator;
}
public int getAnswer() {
return answer;
}
public void setAnswer(int answer) {
this.answer = answer;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
//构造
public Question(int firstParam, int secondParam) {
this.firstParam = firstParam;
this.secondParam = secondParam;
}
}
public class StudentStudy {
private int questionNumber;
private String operator;
private Question[] questions;
private int rightNumber=0;
private int wrongNumber=0;
public String getOperator() {
return operator;
}
public void setOperator(String operator) {
this.operator = operator;
}
public int getQuestionNumber() {
return questionNumber;
}
public void setQuestionNumber(int questionNumber) {
this.questionNumber = questionNumber;
}
public int getRightNumber() {
return rightNumber;
}
public void setRightNumber(int rightNumber) {
this.rightNumber = rightNumber;
}
public int getWrongNumber() {
return wrongNumber;
}
public void setWrongNumber(int wrongNumber) {
this.wrongNumber = wrongNumber;
}
public Question[] getQuestions() {
return questions;
}
public void setQuestions(Question[] questions) {
this.questions = questions;
}
public int getRandom(){
return (int)(Math.random()*10);
}
public int calculateByOperator(String operator,int first,int second){
switch(operator.charAt(0)){
case '+':
return first+second;
case '-':
return first-second;
default:
return 0;
}
}
public void makeQuestion(){
mywhile:
while(questions[questionNumber-1]==null){
Question question=new Question(getRandom(),getRandom());
for(int i=0;questions[i]!=nulliquestionNumber;i++){
if((question.getFirstParam()==questions[i].getFirstParam())(question.getSecondParam()==questions[i].getSecondParam())){
continue mywhile;
}
}
for(int i=0;iquestionNumber;i++){
if(questions[i]==null){
questions[i]=question;
questions[i].setOperator(operator);
questions[i].setScore(100/questionNumber);
questions[i].setAnswer(calculateByOperator(operator,questions[i].getFirstParam(),questions[i].getSecondParam()));
break;
}
}
}
}
public StudentStudy(int questionNumber){
this.questionNumber=questionNumber;
questions=new Question[this.questionNumber];
}
public static void main(String[] args){
Scanner input=new Scanner(System.in);
System.out.println("现在开始测试,请填写要测试的试题数量(1-100):");
int number=input.nextInt();
StudentStudy ss=new StudentStudy(number);
System.out.println("请选择要测试的试题类型:1加法2减法");
int type=input.nextInt();
switch(type){
case 1:
ss.setOperator("+");
break;
case 2:
ss.setOperator("-");
break;
default:
System.out.println("输入有误,退出系统!");
System.exit(0);
}
ss.makeQuestion();
for(int i=0;inumber;i++){
System.out.println("第"+(i+1)+"题:"+ss.getQuestions()[i].getFirstParam()+ss.getQuestions()[i].getOperator()+ss.getQuestions()[i].getSecondParam()+"=?");
int answer=input.nextInt();
if(ss.getQuestions()[i].getAnswer()==answer){
ss.setRightNumber(ss.getRightNumber()+1);
System.out.println("回答正确!");
}
else{
ss.setWrongNumber(ss.getWrongNumber()+1);
System.out.println("回答错误!");
}
}
System.out.println("您总共答了"+ss.getQuestionNumber()+"道题,答对"+ss.getRightNumber()+"道,答错"+ss.getWrongNumber()+"道,最后总分为:"+ss.getRightNumber()*100/ss.getQuestionNumber()+"分");
}
}
Q4: 用Java设计一个小学算术运算测试软件
java算术测试界面代码你java算术测试界面代码的想法是好的java算术测试界面代码，但是我仔细构思了一遍java算术测试界面代码，太难了。
首先难点就是怎么生成题目。也是最难得，因为有太多不确定，弄不好就会出现负数结果的题目。
然后是题目的解答，这个难点就不说了，这个我在几年前就写好了。一直没用上，现在却用上了。
还有，你要窗体，可是我不会用swing
还有你要的四则混合运算是多长的，我总不能写一个有1000多个数字写成的式子吧。
题目中是否涉及到小数
下面是我的计算代码java算术测试界面代码：
package compute;
public class CaculateString {
private String str, s;
private int p1, p2;
public CaculateString(String str) {
this.str = str;
this.clear();
this.check();
}
public String caculate() {
while (isEnd(str)) {
p2 = str.indexOf(")");
if (p2 != -1) {
s = str.substring(0, p2);
p1 = s.lastIndexOf("(");
s = str.substring(p1 + 1, p2);
if (!s.equals("")) {
s = this.caculateNumber(s);
if (p2 == (str.length() - 1))
str = str.substring(0, p1) + s;
else
str = str.substring(0, p1) + s + str.substring(p2 + 1);
} else {
str = str.substring(0, p1) + str.substring(p2 + 1);
}
} else
str = this.caculateNumber(str);
}
return str;
}
private String caculateNumber(String ss) {
int p3 = 0, p4 = 0, p5 = 0;
char b = ' ', c = ' ';
String s1 = null, s2 = null;
double d1 = 0.0, d2 = 0.0, d3 = 0.0;
if (ss.charAt(0) == '+') {
ss = ss.substring(1);
if (ss.indexOf("+") == -1 ss.indexOf("-") == -1
ss.indexOf("*") == -1 ss.indexOf("/") == -1)
return ss;
} else if (ss.charAt(0) == '-') {
if (ss.indexOf("+", 1) == -1 ss.indexOf("-", 1) == -1
ss.indexOf("*", 1) == -1 ss.indexOf("/", 1) == -1)
return ss;
}
while (isEnd2(ss)) {
p3 = 0;
p4 = 0;
p5 = 0;
if (ss.indexOf("*") == -1 ss.indexOf("/") == -1) {
for (int i = 0; i ss.length(); i++) {
b = ss.charAt(i);
if (b == '+' || b == '-') {
if (p3 == 0 i != 0) {
p3 = i;
c = b;
} else if (p3 != 0 i != (p3 + 1)) {
p4 = i;
break;
}
}
}
if (p4 == 0) {
s1 = ss.substring(0, p3);
s2 = ss.substring(p3 + 1);
} else {
s1 = ss.substring(0, p3);
s2 = ss.substring(p3 + 1, p4);
}
d1 = Double.parseDouble(s1);
d2 = Double.parseDouble(s2);
if (c == '+')
d3 = d1 + d2;
else if (c == '-')
d3 = d1 - d2;
if (p4 == 0)
ss = new Double(d3).toString();
else
ss = new Double(d3).toString() + ss.substring(p4);
} else {
if (ss.indexOf("*") == -1) {
c = '/';
p4 = ss.indexOf("/");
} else if (ss.indexOf("/") == -1) {
c = '*';
p4 = ss.indexOf("*");
} else if (ss.indexOf("*") ss.indexOf("/")) {
c = '/';
p4 = ss.indexOf("/");
} else if (ss.indexOf("*") ss.indexOf("/")) {
c = '*';
p4 = ss.indexOf("*");
}
for (int i = p4 - 1; i = 0; i--) {
b = ss.charAt(i);
if (b == '+' || b == '-') {
if ((i - 1) != 0 ss.charAt(i - 1) != '+'
ss.charAt(i - 1) != '-') {
p3 = i;
break;
} else if ((i - 1) != 0
(ss.charAt(i - 1) == '+' || ss.charAt(i - 1) == '-')) {
p3 = i - 1;
break;
}
}
}
for (int i = p4 + 1; i ss.length(); i++) {
b = ss.charAt(i);
if ((b == '+' || b == '-' || b == '*' || b == '/')
(i - 1) != p4) {
p5 = i;
break;
}
}
if (p3 == 0)
s1 = ss.substring(0, p4);
else
s1 = ss.substring(p3 + 1, p4);
if (p5 == 0)
s2 = ss.substring(p4 + 1);
else
s2 = ss.substring(p4 + 1, p5);
d1 = Double.parseDouble(s1);
d2 = Double.parseDouble(s2);
if (c == '*')
d3 = d1 * d2;
else if (c == '/')
d3 = d1 / d2;
if (p3 == 0 p5 == 0)
ss = new Double(d3).toString();
else if (p3 == 0 p5 != 0)
ss = new Double(d3).toString() + ss.substring(p5);
else if (p3 != 0 p5 == 0)
ss = ss.substring(0, p3 + 1) + new Double(d3).toString();
else if (p3 != 0 p5 != 0)
ss = ss.substring(0, p3 + 1) + new Double(d3).toString()
+ ss.substring(p5);
}
}
return ss;
}
private boolean isEnd(String str) {
if (str.indexOf("(") != -1 || str.indexOf(")") != -1
|| str.indexOf("+", 1) != -1 || str.indexOf("-", 1) != -1
|| str.indexOf("*", 1) != -1 || str.indexOf("/", 1) != -1)
return true;
return false;
}
private boolean isEnd2(String ss) {
if (ss.indexOf("+", 1) != -1 || ss.indexOf("-", 1) != -1
|| ss.indexOf("*", 1) != -1 || ss.indexOf("/", 1) != -1)
return true;
return false;
}
private void clear() {
str = str.replaceAll(" ", "");
}
private void check() {
int right = 0, left = 0;
for (int i = 0; i str.length(); i++) {
char a = str.charAt(i);
if (a != '0' a != '1' a != '2' a != '3' a != '4'
a != '5' a != '6' a != '7' a != '8' a != '9'
a != '+' a != '-' a != '*' a != '/' a != '('
a != ')' a != '.') {
System.exit(0);
}
if (a == '(')
left++;
else if (a == ')')
right++;
}
if (left != right) {
System.exit(0);
}
}
public static void main(String args[]) {
System.out.println(new CaculateString("((1-(0/3))*7)+8").caculate());
}
}
Q5: java程序语言设计:设计实现整数的算术运算,并使用图形用户界面,急!
import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JDialog;
import javax.swing.JPanel;
/**
*
* @author beans
*/
public class Test1 {
public static void main(String[] args) {
new Test1().showDialog();
}
/**
* 显示窗口
*/
private void showDialog() {
JDialog dialog = new JDialog();
dialog.setBounds(new Rectangle(150, 150, 370, 85));
dialog.setTitle("整数java算术测试界面代码的算术运算");
dialog.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
dialog.setVisible(false);
dialog.dispose();
}
});
dialog.add(this.getPanel(), BorderLayout.CENTER);
dialog.setVisible(true);
}
private JPanel getPanel() {
JPanel panel = new JPanel();
jTextField1 = new javax.swing.JTextField();
jComboBox1 = new javax.swing.JComboBox();
jTextField2 = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
jTextField3 = new javax.swing.JTextField();
jTextField1.setText("10");
jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[]{"+", "-", "*", "/"}));
jTextField2.setText("10");
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("=");
jTextField3.setText("0");
count();
jTextField1.addKeyListener(new java.awt.event.KeyAdapter() {
@Override
public void keyReleased(java.awt.event.KeyEvent evt) {
count();
}
});
jTextField2.addKeyListener(new java.awt.event.KeyAdapter() {
@Override
public void keyReleased(java.awt.event.KeyEvent evt) {
count();
}
});
jComboBox1.addItemListener(new java.awt.event.ItemListener() {
@Override
public void itemStateChanged(java.awt.event.ItemEvent evt) {
count();
}
});
// 下面是布局代码
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(panel);
panel.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 71, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, 45, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 66, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 58, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(48, Short.MAX_VALUE))
);
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[]{jTextField1, jTextField2, jTextField3});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(22, Short.MAX_VALUE))
);
layout.linkSize(javax.swing.SwingConstants.VERTICAL, new java.awt.Component[]{jTextField1, jTextField2, jTextField3});
return panel;
}
/**
* 计算
*/
private void count() {
int result = 0;
switch (jComboBox1.getSelectedIndex()) {
case 0:
result = Integer.parseInt(jTextField1.getText()) + Integer.parseInt(jTextField2.getText());
break;
case 1:
result = Integer.parseInt(jTextField1.getText()) - Integer.parseInt(jTextField2.getText());
break;
case 2:
result = Integer.parseInt(jTextField1.getText()) * Integer.parseInt(jTextField2.getText());
break;
case 3:
int a = Integer.parseInt(jTextField2.getText());
result = a == 0 ? 0 : Integer.parseInt(jTextField1.getText()) / a;
break;
}
jTextField3.setText(result + "");
}
private javax.swing.JComboBoxString jComboBox1;
private javax.swing.JLabel jLabel1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
}
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