代码：

 1 public class Main {  2     public static void main (String [] args) {  3         for(int i=1;i<=5;i++) {  4             for(int j=1;j<=i;j++) {  5                 System.out.print(i+"x"+j+"="+i*j+" ");  6  }  7  System.out.println();  8  }  9  } 10 }