第一种

 System.out.print("  j   ");
        for (int i = 1; i < 10; i++) {
            System.out.print("\t"+i+"\t");
        }
        System.out.print("\n");
        System.out.print("i----------------------------------------------------------------------------------\n");
        for (int i = 1; i <= 9; i++) {
            System.out.print(""+i+"\t\t");
            for (int j = 1; j <= i; j++) {
                System.out.print(i + "*" + j + "=" + j * i + " \t");
            }
            System.out.println(" ");

        }