数字变String前加0

int 9  转换成 String  0009int 99 转换成 String  0099int 999  转换成 String  0999

public class Test{ public static void main(String[] args){ int x=99; String xs=String.valueOf(x); String [] ss = {"0000","000","00","0"};xs = ss[xs.length] + xs;System.out.print(xs); } }