分析:共9行9列,i控制行,j控制列
public static void main (String[] args){
    for(int i = 1, i < 10, i++){
          for( int j = 1, j <=i , j++){
              system.out.print(j + "*" + i + "=" + j*i +" " );
      }
      system.out.println();
    }


}