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求教有关问题

日期：2014-05-20　 浏览次数：20658 次

求教问题
编写学生类 Student，提供如下字段：age（年龄），name（姓名）。为学生类提供带参数的构造方法用于初始化这两个字段。编写测试类，创建两个学生类的对象stu1和stu2，测试是否stu1==stu2，或者是否stu1。squals（stu2）相等？

------解决方案--------------------
package com.fzw.test;

public class Student {
private int age;
private String name;

public Student(int age, String name) {
super();
this.age = age;
this.name = name;
}

public static void main(String[] args) {
try {
testStudent();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

public static void testStudent() throws Exception {
Student stu1=new Student(1, "胡总");
Student stu2=new Student(2, "温总");
System.out.println("对两学生进行=判断"+stu1.campareStudent(stu1, stu2, 1));
System.out.println("对两学生进行equals判断"+stu2.campareStudent(stu1, stu2, 2));
}

@SuppressWarnings("unused")
private boolean campareStudent(Object stu1,Object stu2,int i) {

return (i==1?stu1==stu2:stu1.equals(stu2));
// TODO Auto-generated method stub

}

}

------解决方案--------------------
Student类 
Java code


public class Student {

    private String name;
    private int age;
    
    public Student(){}
    
    public Student(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }

    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;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + age;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Student other = (Student) obj;
        if (age != other.age)
            return false;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        return true;
    }
    
    
    
    
    
}

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