【Java】LineListDemo

新的

import week02.LineLisDemo;
import java.util.Scanner;
public class Main {
    public static void main(String[] args){
        LineLisDemo LineList=new LineLisDemo();
        Scanner input=new Scanner(System.in);
        System.out.println("1====添加数据====");
        System.out.println("2====打印数据====");
        System.out.println("3====删除数据====");
        System.out.println("请输入需要的操作：");
        int choice=input.nextInt();
        switch(choice){
            case 1:
                System.out.print("请输入需要添加的元素：");
                int a=input.nextInt();
                LineList.adddata(a);
                break;
            case 2:
                LineList.printDate();
                break;
            case 3:
                System.out.println("请输入需要删除的元素下标：");
                int delete=input.nextInt();
                LineList.deleteDate(delete);
                System.out.println("删除成功！");
                break;
            default:
                System.out.println("输入错误！");
        }
    }
}

Main.java

import week02.LineLisDemo;
public class Main {
    public static void main(String[] args){
        LineLisDemo a=new LineLisDemo();
        a.printDate();
        a.adddata(6);
        a.printDate();
        a.adddata(7);
        a.printDate();
        a.adddata(8);
        a.printDate();
        a.insert(1,99);
        a.printDate();
        a.deleteDate(99);
        a.printDate();
        a.deleteDate_2(8);
        a.searchDate(99);
        a.printDate();
        a.update_date(1,2);
        a.printDate();
        a.update_index(6,5);
        a.printDate();
    }
}

LineListDemo.java

package week02;

public class LineLisDemo {
    private int [] data;
    private int length;
    public LineLisDemo() {
        data=new int[100];//数组创建时已经确定数组的大小
        for (int i=0;i<=5;i++){
            data[i]=i+1;
        }
        length=5;
    }
    public void setData(int[] data) {this.data = data;}
    public void setLength(int length) {this.length = length;}
    public int[] getData() {return (this.data);}
    public int getLength() {
        setLength(data.length);
        return (this.length);
    }
    public void printDate(){
        for (int i=0;i<length;i++)
        {
            System.out.printf(data[i]+" ");
        }
        System.out.println();
    }
    public void adddata(int a){
        //末尾添加一个元素
        data[length]=a;
        //length=length+1;
        setLength(++length);//更新顺序长度
    }


    public boolean insert(int i,int a){

        if (length >= data.length){
            System.out.println("表空间已经满，不能插入");
            return false;
        }
        if (i<0||i>=length){
            System.out.println("插入数据不合理");
            return false;
        }
        length++;
        for (int j=length;j>i;j--){
            data[j]=data[j-1];
        }
        data[i]=a;
        return true;
    }
    public boolean deleteDate(int i){
        if(i<0||i>=length){
            System.out.println("删除位置不合理");
            return false;
        }
        for(int j=i;j<length;j++){
            data[j]=data[j+1];
        }
        length--;
        return true;
    }
    public boolean deleteDate_2(int a){
        int index=-1;
        for (int i=0;i<length;i++) {
            if (data[i] == a) {
                System.out.println("找到" + a + "的值的下标了，下标为：" + i);
                index = i;
//            break;
            }
        }
        deleteDate(index);
        return true;
    }
    public boolean delete(int i){
        for(int j=i;j<length;j++){
            data[j]=data[j+1];
            length--;
        }
        return true;
    }
    public int searchDate(int a){
        int index=-1;
        for(int i=0;i<length;i++){
            if(data[i]==a){
                System.out.println("找到"+a+"的值的下标了，下标为："+i);
                index=i;
            }
        }
        return index;
    }
    public boolean update_index(int i,int a){
        data[i]=a;
        return true;
    }
    public boolean update_date(int a,int b){
        int index=searchDate(a);
        data[index]=b;
        return true;
    }
}

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