java點(diǎn)名系統(tǒng)源代碼

import java.awt.GridLayout;

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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("抽獎(jiǎng)");

jtf = new JTextField();

frame.add(jtf);

frame.add(button);

a = new ArrayListString();

arr = new String[]{"張三","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("沒(méi)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);

}

}

JAVA做一個(gè)隨機(jī)點(diǎn)名系統(tǒng)

最簡(jiǎn)單的一個(gè)，你把所有名字存進(jìn)一個(gè)數(shù)組,下面是關(guān)鍵代碼

String[] nameList={"張三","李四","王五"......};//名單全部寫(xiě)上去就可以了

int rdmNum=(int)(Math.random()*nameList.length)//隨即生成0---“總?cè)藬?shù)-1”的數(shù)字，正好對(duì)應(yīng)數(shù)組的索引

System.out.println(nameList[ramNum]);//輸出對(duì)應(yīng)的人名

簡(jiǎn)單嗎?關(guān)鍵代碼我都給寫(xiě)出來(lái)了哦，用小軟件把它生成一個(gè)EXE文件就可以用了。

隨機(jī)點(diǎn)名系統(tǒng) 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("開(kāi)始點(diǎn)名");

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

but.addActionListener(this);

label = new JLabel("隨機(jī)點(diǎn)名");

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

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

show = new JLabel("");

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

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

reset = new JButton("重新點(diǎn)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("點(diǎn)名");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void initListDate(){

//在這個(gè)地方添加姓名就可以了

list.add("劉天廷");

list.add("孔老二");

list.add("張三");

list.add("李四");

list.add("王五");

list.add("麻六");

list.add("馮七");

list.add("京八");

list.add("茅臺(tái)九");

}

public void actionPerformed(ActionEvent e) {

/*確保每人選一次*/

Object obj = e.getSource();

if(obj == but){

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

JOptionPane.showMessageDialog(null,"沒(méi)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();

}