Java第一次作业

1.输出学号班级和姓名

package chap1;
public class text1 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("193230123 计算机1901 万家乐");
    }

}

2.输出以下图形

 

     *

    ***

   *****

    ***

     *

package chap1;
public class text2 {
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("    *");
        System.out.println("   ***");
        System.out.println("  *****");
        System.out.println("   ***");
        System.out.println("    *");

    }

}

3.定义两个整型变量a=5 b=8 求平方和并输出

package chap1;

public class text3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int a=5,b=8;
        int c=a*a+b*b;
        System.out.println(c);
    }

}