值传递

package com.liuc.test.think;

public class PassObject {

	public static void main(String[] args) {
		Letter x=new Letter();
		x.c='A';
		System.out.println("x.c="+x.c);
		change(x);
		System.out.println("x.c="+x.c);
	}
	public static void change(Letter y){
		y.c='Z';
	}

}
class Letter{
	char c;
}

 

结果

x.c=A

x.c=Z