firstprogram.java

java编程代码

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