java特训代码 java课程代码

java练习题求完整代码

按照题目要求编写的用javaBean规范设计的学生类Student的Java程序如下

需要创建user.java.test包,把Student.java文件和Test.java文件放入包中,编译Student.java文件并且编译运行Test.java文件得到运行结果

Student.java文件代码如下

package user.java.test;

import java.io.Serializable;

public class Student implements Serializable{

private static final long serialVersionUID = 1L;

private String no;

private String name;

private double score;

public Student(){}

public Student(String no,String name,double score){

this.no=no;

this.name=name;

this.score=score;

}

public String getNo(){ return no;}

public void setNo(String no){ this.no=no;}

public String getName(){ return name;}

public void setName(String name){ this.name=name;}

public double getScore(){ return score;}

public void setScore(double score){ this.score=score;}

public String toString(){

return "学号:"+no+",姓名:"+name+",成绩:"+score;

}

public static double getAvg(Student[] sArray){

double sum=0,avg;

for(int i=0;isArray.length;i++){

sum=sum+sArray[i].getScore();

}

avg=sum/sArray.length;

return avg;

}

}

Test.java文件代码如下

package user.java.test;

public class Test{

public static void main(String[] args){

Student[] sArray=new Student[5];

sArray[0]=new Student("001","张三",89.5);

sArray[1]=new Student("002","李四",82.5);

sArray[2]=new Student("003","王五",93);

sArray[3]=new Student("004","赵六",73.5);

sArray[4]=new Student("005","孙七",66);

System.out.println("这些学生的平均分:"+Student.getAvg(sArray));

for(int i=0;isArray.length;i++){

System.out.println(sArray[i].toString());

}

}

}

相关问答

Q1: java新手,求完整的源代码

//都是从新手过来的，以下代码供参考

//1.

public class BankAccount {

private static String acctnum;

private static double money;

private static void showAcct() {

System.out.println("账号为: " + acctnum);

}

private static void showMoney() {

System.out.println("余额为: " + money);

}

public BankAccount(String acc, double m) {

this.acctnum = acc;

this.money = m;

}

public static void main(String[] args) {

BankAccount ba = new BankAccount("626600018888", 5000.00);

ba.showAcct();

ba.showMoney();

}

}

//2.

public class Triangle {

private static float a;

private static float b;

private static float c;

public Triangle(float a, float b, float c) {

this.a = a;

this.b = b;

this.c = c;

}

public static boolean judgeTriangle(float a, float b, float c) {

if ((a  Math.abs(b - c)  a  b + c)

 (b  Math.abs(a - c)  b  a + c)

 (c  Math.abs(a - b)  c  a + b))

return true;

else

return false;

}

public float getCircumference() {

return this.a + this.b + this.c;

}

}

//3.

public class TestTriangle {

public static void main(String[] args) {

Triangle t = new Triangle(5.3f,7.8f,9.3f);

if(t.judgeTriangle(5.3f,7.8f,9.3f)){

System.out.print("能够成三角形，周长为: ");

System.out.printf("%9.2f",t.getCircumference());}

else

System.out.println("不能构成三角形");

}

}

Q2: 求一个简单java程序代码，谢谢

public class TestStar {

public static void main(String[] args) {

String star = "*";

for (int i = 0; i 5; i++) {

if (i == 0) {

System.out.print(" " + star);

System.out.println();

}

if (i == 1) {

for (int z = 0; z 4; z++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 2) {

System.out.print(" ");

for (int x = 0; x 3; x++) {

System.out.print(" " + star);

}

System.out.println();

}

if (i == 3) {

for (int y = 0; y 2; y++) {

System.out.print(" " + star + " ");

}

}

}

}

}

是好使的 但是我没找到画五角星有什么规律（五角星好象不是正规图形吧？）如果还有什么要求的话 补充问题(如果是用*填充所有的东西 不包括 “ ”的话 我可以重新再给你写一个)

Q3: Java编程（写出程序代码）

写了一个代码java特训代码，代码如下，可以进行参考

public class sum {

public static void main(String[] args) {

//创建一个Scannerjava特训代码的对象input

Scanner input = new Scanner(System.in); 

//提示用户输入数据 

System.out.print("请输入一个整数");

//将输入的值赋给n

int n = input.nextInt();

//定义变量接收计算后的和

int sum = 0;

//利用循环进行求和

for (int i = 0; i = n; i++) {

sum+=i;

}

//输出最后的和

System.out.println("从0一直到"+n+"的所有整数的和是:"+sum);

}

}

Q4: 求几个JAVA小项目源代码，供自己学习参考

package com.test01;

import java.util.Scanner;

public class oop5 { public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

// int x = 9;

// int y = 1;

int x = sc.nextInt();

int y = sc.nextInt();

int z;

z = add(x, y);

System.out.println("xjava特训代码的值为java特训代码：" + x);

System.out.println("yjava特训代码的值为java特训代码：" + y);

System.out.println("二者之和为：" + z);

}

/** 四种小算法 */

// 加法运算

public static int add(int a, int b) {

int c;

c = a + b;

return c;

}

// 减法运算

public static int jian(int d, int v) {

int m;

m = d - v;

return m;

}

// 乘积运算

public static int addAdd(int q, int w) {

int e;

e = q * w;

return e;

}

// 除法运算

public static int chu(int p, int k) {

int f;

f = p / k;

return f;

}

}

Q5: 求一个简单的JAVA游戏代码，100行左右，谢谢！

import java.awt.Dimension;

import java.awt.Graphics;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class Painter extends JFrame{

/**

*

*/

private static final long serialVersionUID = 8160427604782702376L;

CanvasPanel canvas = new CanvasPanel();;

public Painter() {

super("Star");

this.add(canvas);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.pack();

this.setResizable(false);

this.setLocationRelativeTo(null);

this.setVisible(true);

}

public static void main(String[] args) {

new Painter();

}

}

class CanvasPanel extends JPanel implements ActionListener{

/**

*

*/

private static final long serialVersionUID = -4642528854538741028L;

private JButton[] btn = new JButton[4];

private String[] btn_name = {"+", "-", "R", "L"};

private int center_x = 200, center_y = 200, radius = 100, degree = 0;

public CanvasPanel() {

this.setPreferredSize(new Dimension(400, 500));

this.setLayout(null);

for(int i = 0; i 4; i++) {

btn[i] = new JButton(btn_name[i]);

btn[i].setBounds(160 + i * 60, 425, 50, 50);

btn[i].addActionListener(this);

this.add(btn[i]);

}

}

@Override

public void paintComponent(Graphics g) {

super.paintComponent(g);

for(int i = 0; i 5; i++) {

g.drawLine( (int) (center_x + radius * Math.sin(Math.toRadians(degree + 72 * i))),

(int) (center_y - radius * Math.cos(Math.toRadians(degree + 72 * i))),

(int) (center_x + radius * Math.sin(Math.toRadians(degree + 72 * i + 144))),

(int) (center_y - radius * Math.cos(Math.toRadians(degree + 72 * i + 144))));

}

}

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

if(e.getActionCommand() == "+") {

if(radius 200)

radius += 2;

repaint();

} else if(e.getActionCommand() == "-") {

if(radius 0)

radius -= 2;

repaint();

} else if(e.getActionCommand() == "R") {

degree = (degree + 2) % 360;

repaint();

} else if(e.getActionCommand() == "L") {

degree = (degree - 2) % 360;

repaint();

}

}

}

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