Java基础语法练习10

package jichu;

import java.util.Scanner;

public class Test10 {
    public static void main(String[] args) {
        int[] arr1=new int[5];
        System.out.println("输入第一个整型数组：");
        Scanner sc=new Scanner(System.in);
        for (int i = 0; i < arr1.length; i++) {
            arr1[i]=sc.nextInt();
        }
        int[] arr2=new int[5];
        System.out.println("输入第二个整型数组：");
        for (int i = 0; i < arr2.length; i++) {
            arr2[i]=sc.nextInt();
        }
        System.out.print("数组一：");
        for (int i = 0; i < arr1.length; i++) {
            System.out.print(arr1[i]+" ");
        }
        System.out.println();
        System.out.print("数组二：");
        for (int i = 0; i < arr2.length; i++) {
            System.out.print(arr2[i]+" ");
        }
        System.out.println();
        boolean isEqual=equals(arr1,arr2);
        if(isEqual==true){
            System.out.println("两个数组相同");
        }else{
            System.out.println("两个数组不相同");
        }
        System.out.println("将数组一的所有元素改为指定数字");
        System.out.print("请输入指定数字:");
        int value=sc.nextInt();
        fill(arr1,value);
        System.out.print("修改后的数组一：");
        for (int i = 0; i < arr1.length; i++) {
            System.out.print(arr1[i]+" ");
        }
        System.out.println();
        System.out.println("将数组一的指定元素改为指定数字");
        System.out.println("请输入指定数字:");
        int value1=sc.nextInt();
        System.out.println("请输入开始索引和结束索引：");
        int fromIndex=sc.nextInt();
        int toIndex=sc.nextInt();
        fill(arr1,fromIndex,toIndex,value1);
        System.out.print("修改后的数组一：");
        for (int i = 0; i < arr1.length; i++) {
            System.out.print(arr1[i]+" ");
        }
        System.out.println();
        System.out.println("将数组一的n个元素拷贝到新数组中：");
        System.out.println("请输入需要拷贝的元素个数：");
        int newLength=sc.nextInt();
        int[] arr3;
        arr3=copyOf(arr1,newLength);
        System.out.print("拷贝后的数组：");
        for (int i = 0; i < arr3.length; i++) {
            System.out.print(arr3[i]+" ");
        }
        System.out.println();
        System.out.println("将数组一从开始索引到结束索引的元素复制到新数组中：");
        System.out.println("请输入开始索引和结束索引：");
        int fromIndex1=sc.nextInt();
        int toIndex1=sc.nextInt();
        int[] arr4;
        arr4=copyOfRange(arr1,fromIndex1,toIndex1);
        System.out.print("复制后的数组：");
        for (int i = 0; i < arr4.length; i++) {
            System.out.print(arr4[i]+" ");
        }
    }

    public static boolean equals(int[] arr1,int[] arr2){
        if(arr1.length!=arr2.length){
            return false;
        }else{
            for (int i = 0; i < arr1.length; i++) {
                if(arr1[i]!=arr2[i]){
                    return false;
                }
            }
        }
        return true;
    }

    public static void fill(int[] arr,int value){
        for (int i = 0; i < arr.length; i++) {
            arr[i]=value;
        }
    }

    public static void fill(int[] arr,int fromIndex,int toIndex,int value){
        for (int i = fromIndex; i < toIndex; i++) {
            arr[i]=value;
        }
    }

    public static int[] copyOf(int[] arr,int newLenth){
        int[] arr1=new int[newLenth];
        for (int i = 0; i < newLenth; i++) {
            arr1[i]=arr[i];
        }
        return arr1;
    }

    public static int[] copyOfRange(int[] arr,int from,int to){
        int[] arr2=new int[to-from];
        int j=0;
        for (int i = from; i < to; i++) {
            arr2[j]=arr[i];
            j++;
        }
        return  arr2;
    }
}