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toString() ·½·¨£º
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    ÔÚ½øÐÐStringÓëÆäËüÀàÐÍÊý¾ÝµÄÁ¬½Ó²Ù×÷ʱ£¬×Ô¶¯µ÷ÓÃtoString()·½·¨
    ¿ÉÒÔ¸ù¾ÝÐèÒªÔÚÓû§×Ô¶¨ÒåÀàÐÍÖÐÖØÐ´toString()·½·¨
    »ù±¾ÀàÐÍÊý¾Ýת»»ÎªStringÀàÐÍʱ£¬µ÷ÓÃÁ˶ÔÓ¦·â×°ÀàµÄtoString()·½·¨
public class Person {
    private String name;
    private int age;
    private char sex;
    public Person()
    {
    }
    public Person(String name,int age, char sex)
    {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public char getSex() {
        return sex;
    }
    public void setSex(char sex) {
        this.sex = sex;
    }
    public boolean equals(Object obj)
    {
        if(obj==null)
        {
            return false;
        }
        if(obj==this)//´«µÝ½øÀ´µÄ²ÎÊýÊÇ·ñµÈÓÚ±¾¶ÔÏó
        {
 


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