数据结构之对引用数据类型数组CURD（二）

自定义对象，并使用自定义的对象创建对象数组；

实现对引用数据类型数组的增（Cread）删（Delete）查（Read）改（Update）操作

首先创建一个Person类，有姓名、年龄、性别三个属性

package data_structure_ _array_CURD;

public class Person {
	
	private String name;
	private int age;
	private String sex;
	
	public Person(){
		
	}
	public Person(String name,int age,String 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 String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	

}

创建实现方法类MyArray

package data_structure_ _array_CURD;

public class MyArray {
	private Person [] person;
	private int elems;

	//获取数据的真实长度
	public int getElems() {
		return elems;
	}
	
	//无参构造
	public MyArray(){
		person = new Person[50];
		elems=0;
	}
	
	//有参构造
	public MyArray(int value){
		person = new Person[value];
		elems=0;
	}
	
	//插入数据
	public void insert(Person pers){
		person[elems]=pers;
		elems++;
	}
	
	//遍历
	public void display(){
		for(int i=0;i<elems;i++){
		System.out.println(\"姓名:\"+person[i].getName()+\"年龄:\"+person[i].getAge()+\"性别:\"+person[i].getSex());
		}
	}
	
	//查找数据，返回下标
	public int find(String name){
		int i;
		for(i=0;i<elems;i++){
			if(person[i].getName().equals(name)){
				break;
			}
		}
		if(i==elems){
			return -1;
		}else{
			return i;
		}	
	}
	
	//删除数据
	public int delete(String name){
		
		//找到下标
		int i=find(name);
		if(i!=-1){
			for(int j=i;j<elems;j++){
				person[j]=person[j+1];
			}
			elems--;
			return 1;
		}else{
			return elems;
		}	
	}
	
	//修改数据
	
	public void change(Person oldpers,Person newpers){
		//查找要修改数据的下标
		int i =find(oldpers.getName());
		if(i!=-1){
			person[i]=newpers;
		}
	}
	
}

测试类

package data_structure_ _array_CURD;

public class TestMyArray {
	public static void main(String[] args) {
		MyArray myArray = new MyArray(10);
		
		Person p1 = new Person(\"张三\",18,\"男\");
		Person p2 = new Person(\"李四\",19,\"男\");
		Person p3 = new Person(\"王五\",20,\"女\");
		Person p4 = new Person(\"黄六\",21,\"男\");
		Person p5 = new Person(\"小白\",21,\"女\");
		Person p6 = new Person(\"小黑\",21,\"男\");
		
		myArray.insert(p1);
		myArray.insert(p2);
		myArray.insert(p3);
		myArray.insert(p4);
		myArray.insert(p5);
		
		myArray.display();
		System.out.println(\"------\");
		
		System.out.println(myArray.find(\"李四\"));
		
		System.out.println(\"------\");
		
		myArray.delete(\"黄六\");
		myArray.display();
		System.out.println(\"------\");
		
		myArray.change(p1, p6);
		myArray.display();
	}
}