Java?е??????????????

???????????? ???????[ 2014/4/22 9:55:02 ] ????????Java ????? ???????

????????????????????????????????????????????????????????????????????

?????????????????????????????????????κθ??????????????????????

?????????????????????????????????????????????????????????

?????????Щ??????????Щ????????????

????1???????????8????????????????

????2?????????????String?????????????

????3??Strng???????????????????????????????????

???????????????????

????Student.java

package com.tianjf;

public class Student {
private String name;

public Student??String name?? {
super????;
this.name = name;
}

public String getName???? {
return name;
}

public void setName??String name?? {
this.name = name;
}

??Override
public String toString???? {
return name;
}
}

????Test.java

package com.tianjf;

public class Test {

private static void changeInt??int i?? {
i = 1;
}

private static void changeStudent??Student student?? {
student.setName??"????"??;
}

private static void changeString??String str?? {
str = "456";
}

public static void main??String[] args?? {
int i = 0;
String str = "123";
Student student = new Student??"????"??;
System.out.println??"Before change: i??" + i + " " + "student:" + student.toString???? + " " + "str:" + str??;

changeInt??i??;
changeStudent??student??;
changeString??str??;
System.out.println??"After change: i??" + i + " " + "student:" + student.toString???? + " " + "str:" + str??;
}
}