java传递String参数

java传递String参数不会改变原String参数，此处传递的是copy

package numCombine;

public class NumComberAll {

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		String s = "lll";

		fun(s);

		System.out.println(s);

	}

	public static void fun(String s){

		s = "ttt";

	}

}

lll