第一次Java作业

1.输出学号班级和姓名

public class TestHello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
       System.out.println("193230502 计算机1905蔡俊");
    }

2.输出以下图形

  * 

 ***

*****

 ***

  *

public class homework {

    /**
     * @param args
     */
    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

public class homework {

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

}