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 List 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 ArrayList();

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("没有人了");
break fond;
}
continue fond;
}
i++;
}
a.add(str);
jtf.setText(str);

break;
}
}

});
frame.setSize(500, 500);
frame.setLocation(500, 500);
frame.setVisible(true);

}

}

weqweqeqeqwe2ew`q33wpublic class AutoCallingSystem{

public static void main(String args){

String[] arr = {"A","B","C","D","E","F","G"};

System.out.println(arr[(int)(Math.random()*arr.length)]);

}
}
你只需要修改数组里的内容即可。 ewdsadadwe

public class AutoCallingSystem{

public static void main(String args){

String[] arr = {"A","B","C","D","E","F","G"};

System.out.println(arr[(int)(Math.random()*arr.length)]);

}
}
你只需要修改数组里的内容即可。

楼上的兄弟写的代码简直就是经典！