【java|code】HelloWorld

1.hello world

//filename: HelloWorld.java

//print out "Hello, World!" in the screen.

public class HelloWorld

{

public static void main(String arg[])

{

for(int i=0;i<10;i++)

{

System.out.println("Hello, World!");

}

}

}

command to run:

%java home%/bin/javac HelloWorld.java

creat a file named HelloWorld.class.

%java home%/bin/java HelloWorld

2.extern parameter from mode of command line

//filename: HelloWorld.java

//output 'Hello World!' and what u just input

public class HelloWorld

{

public static void main(String[] args)

{

System.out.println("Hello World!"+args[0]);

}

}

commad to run:

%java home%/bin/javac HelloWorld.java

!

%java home%/bin/java HelloWorld !blogger

---to show up:Hello World!2009

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Wang Liang,snigoal,HUST.Wuhan.China