day05-数组作为方法返回值_返回地址
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79
day05/src/com/inmind/array01/Demo09.java
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79
day05/src/com/inmind/array01/Demo09.java
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package com.inmind.array01;
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/*
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数组作为方法返回值类型_返回地址
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*/
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public class Demo09 {
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public static void main(String[] args) {
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//根据一个整数数组,定义一个方法,将数组中的偶数,提出来组成新的数组返回
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int[] arr = {10, 34, 5, 6, 72, 8, 75, 98};
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//调用方法,获取新的数组,遍历展示数组中内容
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int[] newArr = getOsArray3(arr);
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//新数组的正向遍历
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for (int i = 0; i < newArr.length; i++) {
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System.out.print(newArr[i]+" ");
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}
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}
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//获取偶数数组方式三
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public static int[] getOsArray3(int[] arr){
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//自定义一个索引,来对原始的数据进行索引的维护
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int index = 0;
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//新的数组的长度应该就是偶数的个数!!!
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int count = 0;//统计原数组中偶数的个数
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for (int i = 0; i < arr.length; i++) {
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if (arr[i] % 2 == 0) {
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count++;
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}
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}
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int[] newArr = new int[count];
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for (int i = 0; i < arr.length; i++) {
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//获取每个元素
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int temp = arr[i];
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//判断是否是偶数,是则保存到新数组
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if (temp % 2 == 0) {
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newArr[index] = temp;
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index++;
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}
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}
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return newArr;
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}
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//获取偶数数组方式二
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public static int[] getOsArray2(int[] arr){
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//自定义一个索引,来对原始的数据进行索引的维护
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int index = 0;
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//创建一个新的与原数组长度一样的数组,遍历原数组,判断是偶数,就相应的保存到新数组中
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int[] newArr = new int[arr.length];
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for (int i = 0; i < arr.length; i++) {
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//获取每个元素
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int temp = arr[i];
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//判断是否是偶数,是则保存到新数组
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if (temp % 2 == 0) {
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newArr[index] = temp;
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index++;
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}
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}
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return newArr;
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}
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//定义一个方法,将数组中的偶数,提出来组成新的数组返回
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//获取偶数数组方式一
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public static int[] getOsArray1(int[] arr){
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//创建一个新的与原数组长度一样的数组,遍历原数组,判断是偶数,就相应的保存到新数组中
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int[] newArr = new int[arr.length];
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for (int i = 0; i < arr.length; i++) {
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//获取每个元素
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int temp = arr[i];
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//判断是否是偶数,是则保存到新数组
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if (temp % 2 == 0) {
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newArr[i] = temp;
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}
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}
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return newArr;
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}
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}
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