Java中四种9*9乘法表的实现方式(附代码)

public class Demo {
  public static void main(String[] args) {
   for (int i = 1; i <=5 ; i++) {
      for (int j = 1; j <=i; j++) {
        System.out.print("* ");
      }
      System.out.println("");
    }
  }
 }

System.out.println("左下角");
	for(int i = 1;i<10;i++){
		for(int j = 1;j<=i;j++){
			System.out.print(j+"*"+i+"="+i*j+"\t");

		}
		System.out.println();
	}




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


	System.out.println("左上角");
	for(int i = 9;i>0;i--){
		for(int j = 1;j<=i;j++){
			System.out.print(j+"*"+i+"="+i*j+"\t");
		}
		System.out.println();
	}



	System.out.println("右上角");
	for(int i = 9;i>=1;i--){
		for(int j=9;j>=1;j--){
			if(j<=i){
			System.out.print(j+"*"+i+"="+i*j+"\t");
			}else{
			System.out.print("\t\t");
			}
		}
		System.out.println();
	}

}