第一个java小程序
程序名：MyFirstJavaProgram.java
//package com.example;
public class MyFirstJavaProgram {
public static void main(String[] args){
System.out.println("Hello World!");
}
}
cmd下编译运行
D:javaprogram>javac MyFirstJavaProgram.java
D:javaprogram>java MyFirstJavaProgram
Hello World!