java生成world文件_HelloWorld.java文件如何创建?

原创HelloWorld.java文件如何创建?

编辑:小丸子 来源:PC下载网时间:2017-10-17 19:55:54

相信各位刚接触JAVA的新人都希望尽快编写出自己的第一个程序,今天PC下载网小编和你一起学习HelloWorld程序

1.首先我们先点击“开始”—然后是“所有程序”—在然后是“附件”—记事本,新建记事本,输入以下代码:

class HelloWorld {    public static void main(String args[])    {          System.out.println("Hello World");    } }

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2.点击记事本的“文件菜单”—在点击“保存”—将文件名命名为“HelloWorld.java”—点击“保存”

73bfb2de82bff20bac535b90fbf2e89d.png

3.在将“HelloWorld.java”文件放到你想存放的地方,这篇教程小编放到了D:\Java文件夹中

4.点击“开始”—“运行”—“输入cmd”—“确定”,进入DOS,更换盘符到 HelloWorld.java 文件所在目录 D:\Java,键入 javac HelloWorld.java 后回到文件所在目录 D:\Java,程序会自动新建一个文件HelloWorld.class,这个文件就是刚刚编写出来的程序

2175e4b2f5b2b9e241c580daefd2a406.png

5、再次键入java HelloWorld 数秒后DOS将显示 Hello World。

更改System.out.println("Hello World")中的Hello World变为其他内容,将会有不同的效果,快自己动手试试吧,是不是很容易,相信你一看就会

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