publicclasslearn{publicstaticvoidmain(String[] args){System.out.println("九九乘法表");for(int i =1; i<10;i++){for(int j=1;j<=i;j++){System.out.print(j +"*"+ i +"="+ i * j +"\t");}System.out.print("\n");//等价于System.out.println();//两条语句等价 }//增强for循环的表示System.out.println("增强for循环");int[] number ={1,2,3,4,5,6,7,8,9};for(int x : number){System.out.print(x);}// 打印101-150之间所有的质数System.out.println();for(int i =101; i <150; i++){for(int j=2;j<i/2;j++){if(i%j==0){break;}if(j==i/2-1)System.out.println(i);}}}