写一个方法，用一个for循环打印九九乘法表

[lenotang]

大家集思广益：
/**
* 一个for循环打印九九乘法表
*/
public void nineNineMultiTable()
{
for (int i = 1,j = 1; j <= 9; i++) {
System.out.print(i+"*"+j+"="+i*j+" ");
if(i==j)
{
i=0;
j++;
System.out.println();
}
}
}

[ganyusheng0604]

错了，应该是：

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

}
}
}
}

[kiss601459202]

哈哈 一次循环99乘法 我也来一个

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

[kiss601459202]

再来一个更生猛的 一个For都不用

public static void main(String[] args) {
		getNum(9);
	}

	public static void getNum(int num) {
		if (num == 1) {
			System.out.println("1*1=1");
		} else {
			getNum(num - 1);
			getN(1, num);
			System.out.println();
		}
	}

	public static void getN(int x, int y) {
		if (x <= y) {
			System.out.print(x + "*" + y + "=" + (x * y) + " ");
			getN(x + 1, y);
		}
	}

[wangxin6302]

来个递归的，如有重复纯属巧合

public static void main(String[] ages) {
		nineNineMultiTable(9);
	}
	
	public static void nineNineMultiTable(int i) {
		if(i > 1) nineNineMultiTable(i-1);
		for(int j=1;j<=i;j++) {			
			System.out.print(i + "*" + j + "=" + i*j + "\t");
		}
		System.out.println();
	}

[paullbm]

。。。。。。。。。。

[伟明]

一定要一个吗？

[fubin438094754]

public void print() {
for (int i = 1; i <= 9; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(j + "*" + " i =" + i *j + " ");
}
System.out.println();
}
}

[唐三角]

俺脚着俺这个是性能最好的了，不给分没天理啊：

String[] list = {
"01",
"02 04",
"03 06 09",
"04 08 12 16",
"05 10 15 20 25",
"06 12 18 24 30 36",
"07 14 21 28 35 42 49",
"08 16 24 32 40 48 56 64",
"09 18 27 36 45 54 63 72 81",
};
for(int i = 0; i < 0; i++){
    System.out.println(list[i]);
}

[makingjc]

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

[fensese]

public class Test {

public static void main(String[] args) {

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

結果：
　1 * 1 = 1 1 * 2 = 2 1 * 3 = 3 1 * 4 = 4 1 * 5 = 5 1 * 6 = 6 1 * 7 = 7 1 * 8 = 8 1 * 9 = 9
2 * 2 = 4 2 * 3 = 6 2 * 4 = 8 2 * 5 = 10 2 * 6 = 12 2 * 7 = 14 2 * 8 = 16 2 * 9 = 18
3 * 3 = 9 3 * 4 = 12 3 * 5 = 15 3 * 6 = 18 3 * 7 = 21 3 * 8 = 24 3 * 9 = 27
4 * 4 = 16 4 * 5 = 20 4 * 6 = 24 4 * 7 = 28 4 * 8 = 32 4 * 9 = 36
5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45
6 * 6 = 36 6 * 7 = 42 6 * 8 = 48 6 * 9 = 54
7 * 7 = 49 7 * 8 = 56 7 * 9 = 63
8 * 8 = 64 8 * 9 = 72
9 * 9 = 81

[fensese]

public class Test {

public static void main(String[] args) {

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

結果：
1 * 1 = 1 1 * 2 = 2 1 * 3 = 3 1 * 4 = 4 1 * 5 = 5 1 * 6 = 6 1 * 7 = 7 1 * 8 = 8 1 * 9 = 9
2 * 2 = 4 2 * 3 = 6 2 * 4 = 8 2 * 5 = 10 2 * 6 = 12 2 * 7 = 14 2 * 8 = 16 2 * 9 = 18
3 * 3 = 9 3 * 4 = 12 3 * 5 = 15 3 * 6 = 18 3 * 7 = 21 3 * 8 = 24 3 * 9 = 27
4 * 4 = 16 4 * 5 = 20 4 * 6 = 24 4 * 7 = 28 4 * 8 = 32 4 * 9 = 36
5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45
6 * 6 = 36 6 * 7 = 42 6 * 8 = 48 6 * 9 = 54
7 * 7 = 49 7 * 8 = 56 7 * 9 = 63
8 * 8 = 64 8 * 9 = 72
9 * 9 = 81

[nizhicheng]

哎呦~~真是精彩哈~~~

[kiss601459202]

[Quote=引用 45 楼 deltatang 的回复:]

俺脚着俺这个是性能最好的了，不给分没天理啊：

Java code

String[] list = {
"01",
"02 04",
"03 06 09",
"04 08 12 16",
"05 10 15 20 25",
"06 12 18 24 30 36",
"07 14 21 28 35 42 49",
"08 16 24 32 40 48 56 64",
"09 18 27 3……
[/Quote]

给你分就没天理了 你这个输出不了东西

[qqlwq123]

有什么用，时间复杂度一样没变，理解上反而没有嵌套好理解，代码又不见得简洁，完全是弊大于利。

[听可笑的承诺]

这个最好写了……

[冰点小爱]

昨天ITAT好像是要一个FOR写，我写了两个FOR的，哎。一个FOR的

public class Chengfabiao {

 public static void main(String[] args) {

  String output = "9 9 乘法表\n";
  output += "~~~~~~~~~~~~~~~~~~~~~\n";
  for (int i = 1, j = 1; i < 10; j++) {
   output += "\t"+ j + "*" + i + "=" + j * i;
   if (i == j) {
    j = 0;
    i++;
    output += "\n";
   }
  }
  System.out.println(output);
 }
}

[keyer114]

public void chengfabiao(){

for(int i=1;i<=9;i++){

for(int j=1;j<=i;j++){

System.out.print(i+"*"+j+"="+i*j+"\t");

}
System.out.println();
}

}

[LucEaspe]

public class Nine2Nine {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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();
		}
	}
}

[LucEaspe]

public class Nine2Nine {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		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();
		}
	}
}
/*
1*1=1	
1*2=2	2*2=4	
1*3=3	2*3=6	3*3=9	
1*4=4	2*4=8	3*4=12	4*4=16	
1*5=5	2*5=10	3*5=15	4*5=20	5*5=25	
1*6=6	2*6=12	3*6=18	4*6=24	5*6=30	6*6=36	
1*7=7	2*7=14	3*7=21	4*7=28	5*7=35	6*7=42	7*7=49	
1*8=8	2*8=16	3*8=24	4*8=32	5*8=40	6*8=48	7*8=56	8*8=64	
1*9=9	2*9=18	3*9=27	4*9=36	5*9=45	6*9=54	7*9=63	8*9=72	9*9=81
*/

[zhuyechuan]

public void nineNineMultiTable()
{
for (int i = 1,j = 1; j <= 9; i++) {
System.out.print(i+"*"+j+"="+i*j+" ");
if(i==j)
{
i=0;
j++;
System.out.println();
}
}
}