木卫

代码如下public class HelloWorld { public static void main(String[] args) { double m = 78.5; //将基本类型转换为字符串 String str1 = Double.toString(m); ; System.out.println("m 转换为String型后与整数20的求和结果为： "+(str1+20));

**代码如下：**public class HelloWorld { public static void main(String[] args) { // Java文件名 String fileName = "HelloWorld.java"; // 邮箱 String email = "laurenyang@imooc.com"; // 判断.java文件名是否正确：合法的文件名应该以.java结尾 /*

public class HelloWorld{public static void main(String[] args){int num = 999;int count = 0;if(num>=0&&num<=9999999){while(num!=0){count++;num/=10;}System.out.println(“它是个”+count+“位的数！”);}else{System.out.println(“输入有误！”);}}}输出结果

import java.io.*;public class Java_2{ public static void main(String[] args) { Java_2 exceptionExample = new Java_2(); try { FileInputStream fi = new FileInputStream(...

package day01;import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;public class Java_3{ public static void main(String[] args) { JFrame frame = new Image...

package day01;import java.util.*;public class Java_2{ public static void main(String[] args) { Student[] java = new Student[3]; //new一个 Student长度为3的数组...

代码如下import javax.swing.JOptionPane;public class Java_1 { public static void main( String args[] ){ //变量初始化 int passes = 0, //考生通过的数目 failures = 0, //考...

输入一个十进制整数，用二进制表示出来。 package day06; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Java_3 extends JFrame { public Java_3(){ sup...

public class Java_1{ public static void main (String args[]) { new SimpleThread("第1").start(); new SimpleThread("第2").start(); }} class SimpleThread extends Thread{ publ...

import java.awt.*;import javax.swing.*;public class Java_3 extends JApplet{ public void init () { Container contentPane = getContentPane(); JLabel label = new JLabel("One World ...

package day04;import java.util.Scanner;public class AddCalculator{ public static void main(String[] args){ // TODO Auto-generated method stub Scanner scan = new Scanner(System.in); ...

输出Hello JAVApackage day01;public class HelloJAVA{//申明类HelloJAV //主方法。为程序入口 //程序从main开始，main结束则程序结束public static void man(String[] args){//输出 HelloJAVA //1.JAVA严格区分大小写 //2.所有符号必...

package day05；public class Add{ public static void main(String[] args) { int a =0; int b=0; int c =a++; int d =++b; System.out.println(c); ...

import java.util.Scanner;public class MethodDemo { public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.println("请输入第一个值"); int a = ...

一，switch casepackage day03; //1.声明包day03；import java.util.Scanner; //2.CommandBySwitch类继承系统类Scannerpublic class CommandBySwitch{ ...

用三种循环方式实现，while、dowhile、for一、while循环package day02;//声明包day02public class AddSumWhile{//声明类Addsumwhile public static void main(String[] args){ int num=0; int i=0; //1...