package com.jessyframe.learn;

import java.lang.String;
import java.utils.Arrays;
/**
 *
 * Created by jessy on 2022/12/24.
 */
public final class Immutable {
    private final int identity;
    private final String value;
    private final int[] arr;

    public Immutable(int identity, String value, int[] outArr) {
        this.identity = identity;
        this.value = value;
        //this.arr = outArr; //不正确
        this.arr = outArr.clone();//使用传入数组的copy初始化
    }

    public int[] getArr() {
        //return arr; //不正确
        return arr.clone(); //返回数组的copy
    }

     
        public static void main(String[] args) {
        int[] arr = new int[]{12,34};
        Immutable im = new Immutable(123,"jessyframe", arr);
        int[] arr1 = im.getArr();
        Arrays.stream(arr1).forEach((e) -> {System.out.println(e);});
        arr[0] = 56;
        arr[1] = 78;
        Arrays.stream(arr1).forEach((e) -> {System.out.println(e);});
    }

}
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