public class Demo { /** *九九乘法表 */ 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)+ "\t"); if (i==j) { System.out.print( "\n"); } } } } }