Java小练习

 1 public class Test {
 2     public static void main(String[] args) {
 3 
 4         int a, b, c;
 5         for (a = 1; a < 10; a++) {
 6             for (b = 1; b <= a; b++) {
 7                 c = a * b;
 8                 System.out.print(a + "*" + b + "=" + c);
 9                 System.out.print(" ");
10             }
11             System.out.println();
12         }
13 }

 1 public class Test {
 2     public static void main(String[] args) {
 3 
 4         int e, d, f, g;
 5         for (e = 100; e < 1000; e++) {
 6             d = e / 100;
 7             f = e / 10 % 10;
 8             g = e % 10;
 9             if (e == d * d * d + f * f * f + g * g * g)
10                 System.out.println(e);
11         }
12 }

 1 public class Test {
 2     public static void main(String[] args) {
 3         int h, j, k, l, m;
 4         for (m = 1000; m < 10000; m++) {
 5             h = m / 1000;
 6             j = m / 100 % 10;
 7             k = m / 10 % 100;
 8             l = m % 10;
 9             if (m * 9 == l * 1000 + k * 100 + j * 10 + h)
10                 System.out.println(m);
11         }
12 }

 1 public class ZHOU {
 2     public static void main(String[] args) {
 3         int ab,abc,f,g;
 4         for(ab=1;ab<5;ab++){
 5             for(f=4;f>ab;f--){
 6                 System.out.print(" ");
 7             }
 8             for (abc=1;abc<2*ab;abc++){
 9                 System.out.print("*");
10             }
11             for(g=4;g>ab;g--){
12                 System.out.print(" ");
13             }
14             System.out.println(" ");
15         }
16 }