java随机点名代码 java随机点名程序循环结构

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] + " "); } }}

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java随机点名代码了

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java随机点名代码了java随机点名代码！");

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: javaweb写个随机点名的代码

//首先我们可以先把名字搞成一个数组，或者List都是可以的。

    String[] arr = {"张三","李四","王五","xxx"....};

    String random = arr[new Random().nextInt(arr.size())];

    System.out.println("随机名字为："+random);

Q3: Java随机抽取人名完整代码是什么？

public class test {\x0d\x0a public static void main(String[] args) {\x0d\x0a //定义人名数组\x0d\x0a String [] name = {"张三","李四","王五","八神庵","不知火舞","大蛇","景天","唐雪见","李逍遥","赵灵儿"};\x0d\x0a//随机生成数组下标、\x0d\x0a int num = (int)(Math.random() * 1000);\x0d\x0a//对生成的随机数进行判断，如果小于数组下标，就跳出循环\x0d\x0awhile (numname.length-1) {\x0d\x0a if (num

回答于 2022-11-16

Q4: java 如何弄个简单的随机点名,不用名字,直接数字就可以

import java.util.Random;

public class RandomD {

public static void main(String[] args) {

System.out.println("随机点名开始!我将要在5个同学中点名!");

String[] student={"张三","李四","王五","麻子","小猪"};

Random rand=new Random();

System.out.println("点名开始:");

try {

Thread.sleep(1000);

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println(student[Math.abs(rand.nextInt()%5)]);

}

}

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