public class ChengFa {
    public static void main(String[] args) {
        for(int i=1;i<=9;i++){
            for(int j=1;j<=i;j++){
                System.out.print(i+"*"+j+"="+(i*j)+" ");
                if(i==j){
                    System.out.println();
                }
            }
        }
    }
}

//九九乘法表
public class Cf
{
  public static void main(String[]args)
  {
   for(int i=1;i<10;i++)
   {
    for(int j=1;j<10;j++)
    {
     int k=i*j;
     System.out.print(i+"*"+j+"="+k+" ");
    }
    System.out.println();
   }


 }

}

class MultTable {
  public static void print(byte m) {
    for(byte b = 1; b <= m; b++) {
      for(byte a = 1; a <= b; a++)
        System.out.print(b + "*" + a + "=" + b*a +" ");
      System.out.println();
    }  //for end.
  } 
}  //class MultTable end.

public class MyClass {
  public static void main(String[] args) {
    byte max =9;
    MultTable.print(max);    //输出1*1 到 max*max 的乘法表
  }
}

public class K
public class static void main(String[] args){
int i,j;
for(i=0;i<10;i++)
{
for(j=0;j<=i;j++)
System.out.print(i+"*"+j+"="+i*j+"  ")  

}
System.out.println();    //在打印第一行之后换行
  


}

public class MultiplicationTable{
    public static void main(String args[]){
        for(int i =1;i <=9;i ++){
            for(int j =1;j <= i;j ++){
                String str = j + "*" + i + "=" + j * i;
                System.out.print(str + "\t);
            }
            System.out.println();
         }
     }
}

修改：System.out.print(str + "\t");