Java第一次作业

1.输出学号班级和姓名

public class Exe1 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("193230213计算机1902刘奥杰");

    }

}

2.输出以下图形

  *

 ***

*****

 ***

  *

public class Exe2 {

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

3.定义两个整型变量a=5  b=8  求平方和并输出

public class Exe3 {

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

}