求java编程的代码

代码如下，望采纳

public class PrintPrime{

public static void main(String args[]){

    //设置一个计数变量count，用于统计一行当中已经输出数字的个数

int count = 0;

//写代码时人为判断200为非素数，如果不考虑题目的严格要求的话，可以写成200

for(int i = 100;i=200;i++){

    //判断数字是否为素数，若是，则count+1并输出数字

if(PrintPrime.IsPrime(i)){

count++;

System.out.print(i+" ");

}

//如果一行十个已经输出完毕，计数归零，换行

if(count==10){

count=0;

System.out.println();

}

}

}

//判断数字是否为素数

public static boolean IsPrime(int n){

    //如果小于等于三，则大于一即为素数

if (n = 3) {

return n  1;

}

        //从2循环到数字的开平方，算法优化

for(int i=2;i=Math.sqrt(n);i++){

if(n%i == 0)

return false;

}

return true;

}

}

求大神帮忙，写一个跟女生表白的程序，最好是java语言写的

额，网上有很多类似的图片。比如双击之后，出来一个男的，拿着鲜花，说一句我爱你之类的，也可以直接出来一句话，表白就好了。

JAVA编程代码

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.*;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextField;

public class LoginFrame extends JFrame {

/**

*

*/

private static final long serialVersionUID = 2899557721654693611L;

final JTextField jt1 = new JTextField ();

final JTextField jt2 = new JTextField ();

public LoginFrame() {

this.setTitle("学生登陆");

this.setLayout(null);

this.setBounds(200, 200, 400, 300);

JButton jb1 = new JButton("登陆");

JButton jb2 = new JButton("退出");

jb1.setBounds(50, 230, 80, 20);

jb2.setBounds(270,230,80,20);

jt1.setBounds(170,80,100,20);

jt2.setBounds(170,170,100,20);

JLabel jl1 = new JLabel("用户名");

JLabel jl2 = new JLabel("密码");

jl1.setBounds(80, 80, 50, 20);

jl2.setBounds(80, 170, 50, 20);

add(jb1);

add(jb2);

add(jt1);

add(jt2);

add(jl1);

add(jl2);

this.setVisible(true);

this.addWindowListener(new WindowAdapter() {

@Override

public void windowClosing(WindowEvent e) {

// TODO Auto-generated method stub

setVisible(false);

System.exit(0);

}

});

jb1.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

new IntoTxt().intotex(jt1.getText(), jt2.getText());

}

});

jb2.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

// TODO Auto-generated method stub

setVisible(false);

System.exit(0);

}

});

}

public static void main(String[] args) {

LoginFrame lf = new LoginFrame();

}

}

class IntoTxt {

public void intotex(String name,String password) {

BufferedWriter bw;

File file = new File("D:/write.txt");

if(!file.exists()) {

try {

file.createNewFile();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

try {

bw = new BufferedWriter(new FileWriter(file,true));

bw.newLine();

bw.write("用户名是 ");

bw.write(name);

bw.write(" 密码是 ");

bw.write(password);

bw.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

Java编程（写出程序代码）

写了一个代码，代码如下，可以进行参考

public class sum {

public static void main(String[] args) {

//创建一个Scanner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);

}

}

求Java编程代码

import java.util.Arrays;

public class Test {

public static void main(String[] args) {

int[] arr={1,2 ,3 , 78 ,  34 ,  33 , 16 , 35};

Arrays.sort(arr);

for(int i=arr.length-1;i=0;i--){

System.out.print(arr[i]+"\t");

}

System.out.println();

int a=0;

for(int i=arr.length-1;i=0;i--){

if(i0a==arr[i]arr[i]-arr[i-1]==1){

continue;

}

if(i0arr[i]-arr[i-1]==1){

a=arr[i-1];

System.out.print(arr[i]+"\t");

}else{

System.out.print(arr[i]+"\t");

}

}

}

}

java编程代码!请仔细看我的说明. . .

我来帮您，代码如下：

import java.awt.Container;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JProgressBar;

public class A extends JFrame {

private static final long serialVersionUID = 1L;

JProgressBar pb;

A() {

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setSize(300, 300);

setLocation(400, 100);

getContentPane().setLayout(null);

pb = new JProgressBar(); // 改动1

pb.setBounds(10, 201, 212, 40);

getContentPane().add(pb);

setTitle("滚动条测试！");

pb.setStringPainted(true);

final JLabel label = new JLabel();

label.setText("正在登陆验证，请稍候。。。");

label.setBounds(10, 179, 212, 18);

getContentPane().add(label);

final JLabel label03 = new JLabel();

label03.setBounds(49, 247, 13, 18);

getContentPane().add(label03);

final JLabel label04 = new JLabel();

label04.setBounds(68, 247, 13, 18);

getContentPane().add(label04);

final JLabel label05 = new JLabel();

label05.setBounds(86, 247, 13, 18);

getContentPane().add(label05);

final JLabel label06 = new JLabel();

label06.setBounds(105, 247, 13, 18);

getContentPane().add(label06);

final JLabel label07 = new JLabel();

label07.setBounds(124, 247, 13, 18);

getContentPane().add(label07);

final JLabel label02 = new JLabel();

label02.setBounds(30, 247, 13, 18);

getContentPane().add(label02);

final JLabel label01 = new JLabel();

label01.setBounds(10, 247, 13, 18);

getContentPane().add(label01);

final JLabel label08 = new JLabel();

label08.setBounds(143, 247, 13, 18);

getContentPane().add(label08);

final JLabel label09 = new JLabel();

label09.setBounds(162, 247, 13, 18);

getContentPane().add(label09);

final JLabel label10 = new JLabel();

label10.setBounds(177, 247, 13, 18);

getContentPane().add(label10);

JButton btn1 = new JButton("登陆");

btn1.addActionListener(new ActionListener() {

private int i;

public synchronized void actionPerformed(final ActionEvent e) {

new Thread() {

public synchronized void run() {

for (i = 0; i = 100; i++) {

pb.setValue(i);

try {

Thread.currentThread();

Thread.sleep(200);

} catch (InterruptedException e1) {

e1.printStackTrace();

}

switch (i) {

case 0:

label01.setText("*");

break;

case 10:

label01.setText("*");

label02.setText("*");

break;

case 20:

label01.setText("*");

label02.setText("*");

label03.setText("*");

break;

case 30:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

break;

case 40:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

break;

case 50:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

label06.setText("*");

break;

case 60:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

label06.setText("*");

label07.setText("*");

break;

case 70:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

label06.setText("*");

label07.setText("*");

label08.setText("*");

break;

case 80:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

label06.setText("*");

label07.setText("*");

label08.setText("*");

label09.setText("*");

break;

case 90:

label01.setText("*");

label02.setText("*");

label03.setText("*");

label04.setText("*");

label05.setText("*");

label06.setText("*");

label07.setText("*");

label08.setText("*");

label09.setText("*");

label10.setText("*");

break;

case 100:

JOptionPane.showMessageDialog((new A()

.getContentPane()), "登陆成功", "恭喜您！",

JOptionPane.WARNING_MESSAGE);

label01.setText("");

label02.setText("");

label03.setText("");

label04.setText("");

label05.setText("");

label06.setText("");

label07.setText("");

label08.setText("");

label09.setText("");

label10.setText("");

pb.setValue(0);

}

}

}

}.start();

}

});

btn1.setBounds(86, 92, 90, 39);

Container con = getContentPane();

con.add(btn1);

}

public static void main(String[] args) {

new A().setVisible(true);

}

}