public class XXK4 { public static void main(String[] args) { String []a={"xxk","weirong","xucong","xuxiaohua","baojuan"}; int m=0; for(int i=0; i<a.length; i++) { int n=a[i].length(); if(n>m) m=n; } System.out.println("m="+m); } } 程序运行的结果是m= ( )。