作業一

程式內容
package args;

public class Firstprogram {


public static void main(String[] args)
{
System.out.println("hello realer.");
System.out.println("welcome to java.");
System.out.println("let's demonstrate a simple calculation.");
int answer;
answer=2+2;
System.out.println("2 plus 2 is"+answer);
}
}


程式結果
hello realer.

welcome to java.

let's demonstrate a simple calculation.

2 plus 2 is4