点名java代码 java点名程序代码

java点名系统源代码

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.Scanner;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JTextField;

public class test {

static String[] arr;

static boolean flag=true;

static ListString a;

static JTextField jtf;

public static void main(String[] args) {

// TODO Auto-generated method stub

JFrame frame=new JFrame();

frame.setLayout(new GridLayout(1,2));

JButton button = new JButton("抽奖");

jtf = new JTextField();

frame.add(jtf);

frame.add(button);

a = new ArrayListString();

arr = new String[]{"张三","李四","王五"};

button.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

int i=0;

fond:

while(true){

String str = arr[(int)(Math.random()*arr.length)];

for(String b:a){

if(b.equals(str)){

if(i=arr.length){

jtf.setText("没有人点名java代码了");

break fond;

}

continue fond;

}

i++;

}

a.add(str);

jtf.setText(str);

break;

}

}

});

frame.setSize(500, 500);

frame.setLocation(500, 500);

frame.setVisible(true);

}

}

相关问答

Q1: 随机点名系统 java

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.ArrayList;

import java.util.List;

import java.util.Random;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

public class test_random extends JFrame implements ActionListener{

public static void main(String[] args) {

test_random t = new test_random();

t.init();

}

public void init(){

initListDate();

but = new JButton("开始点名");

but.setBounds(100,150,100,40);

but.addActionListener(this);

label = new JLabel("随机点名");

label.setBounds(60,20,300,40);

label.setFont(new Font("楷体",Font.BOLD,40));

show = new JLabel("");

show.setBounds(110,80,200,30);

show.setFont(new Font("楷体",Font.BOLD,30));

reset = new JButton("重新点名");

reset.setBounds(203,246,90,25);

reset.addActionListener(this);

add(but);

add(label);

add(show);

add(reset);

setLayout(null);

setVisible(true);

setResizable(false);

setBounds(100,100,300,300);

setTitle("点名");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void initListDate(){

//在这个地方添加姓名就可以了

list.add("刘天廷");

list.add("孔老二");

list.add("张三");

list.add("李四");

list.add("王五");

list.add("麻六");

list.add("冯七");

list.add("京八");

list.add("茅台九");

}

public void actionPerformed(ActionEvent e) {

/*确保每人选一次*/

Object obj = e.getSource();

if(obj == but){

if(list.size()==0){

JOptionPane.showMessageDialog(null,"没有人了！");

return ;

}else{

Random ran = new Random();

int num = ran.nextInt(list.size());

show.setText(list.get(num));

list.remove(num);

}

}

if(obj == reset){

show.setText("");

initListDate();

}

}

private JButton but ;

private JLabel label;

private JLabel show;

private JButton reset;

private ListString list = new ArrayListString();

}

Q2: Java求助 ，Java用Scanner以及遍历数组还有for循环写一个随机点名的代码？

import java.io.BufferedInputStream;import java.util.Scanner; public class test1 { public static void main(String[] args) { Scanner cin = new Scanner(new BufferedInputStream(System.in)); int n = cin.nextInt(); // 输入n个数 int[] a = new int[n]; for (int i = 0; i n; ++i) { a[i] = cin.nextInt(); } cin.close(); for (int i = a.length - 1; i = 0; --i) { // 逆序输出 System.out.print(a[i] + " "); } }}

点名java代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java点名程序代码、点名java代码的信息别忘了在本站进行查找喔。