collection容器的小程序

Student.java

package com.zyl;

public class Student implements Comparable<Student>{
	private Long studentId;
	private String name;
	public Student(){
		
	}
	public  Student(Long studentId,String name) {
		this.studentId=studentId;
		this.name = name;
	}
	public Long getStudentId(){
		return this.studentId;
	}
	public String getName() {
		return name=name;
	}
    public int hashCode(){
    	return studentId.hashCode();
    }    
    public boolean equals(Student stu){
    	if(stu==null) return false;
    	boolean isResult =
    		this.studentId.equals(stu.getStudentId())&&this.getName().equals(stu.getName());
    	return isResult;   
    }
    public String toString(){
    	 
        return "[studentId="+studentId+",name="+name+"]";

      }
    public int compareTo(Student student) {
		// TODO Auto-generated method stub
		return this.getStudentId().compareTo(student.getStudentId());

	}
   
}