Java starts from scratch (a common method of the Arrays class for arrays), and Arrays starts from scratch

Java starts from scratch (a common method of the Arrays class for arrays), and Arrays starts from scratch
I. Common Arrays Methods

Ii. Simple Example

Package com. pb. demo1; import java. util. arrays;/** several common methods in the Arrays tool class * 1. copyof * 2. toString * 3. equals * 4. sort * 5. fill * 6. binarySearch */public class ArraysTest {public static void main (String [] args) {String [] arry1 = {"Beijing", "Shanghai", "Chongqing ", "Shenzhen"}; String [] arry2 = Arrays. copyOf (arry1, 4); // copy copyof System. out. println ("arry2 is:" + Arrays. toString (arry2); // compare equals System. out. println ("is arry1 equal to arry2?" + Arrays. equals (arry1, arry2); // sort arry1 to sort Arrays. sort (arry1); // toString System. out. println ("value of arry1 after sorting:" + Arrays. toString (arry1); // after sorting, whether arry1 and arry2 are equal to equals System. out. println ("whether arry1 and arry2 are equal after sorting" + Arrays. equals (arry1, arry2); // fill in fill Arrays. fill (arry2, "Guangzhou"); System. out. println ("the value of arry2 after filling:" + Arrays. toString (arry2); // you can use System to query binarySearch only after the array has been sorted. out. println ("Location of Chongqing in arry1:" + Arrays. binarySearch (arry1, "Chongqing "));}}

Result:

Arry2 is: [Beijing, Shanghai, Chongqing, Shenzhen]
Whether arry1 and arry2 are equal: true
Value of arry1 after sorting: [Shanghai, Beijing, Shenzhen, Chongqing]
Whether arry1 and arry2 are equal after sorting is false
Value of arry2 after filling: [Guangzhou, Guangzhou]
Location of Chongqing in arry1: 3