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_object_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_object_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

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

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

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_object_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","女");

Person p6 = new Person("小黑","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();

}

}

（编辑：李大同）

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