java Arrays class details and example code

Recently, I used Arrays class in my project. I hope you can master Arrays.

1. Arrays class overview

  utility class that operates on arrays.

  provides sorting, searching and more.

2. Member method

  public static String toString(int[] a)

  public static void sort(int[] a)

  public static int binarySearch(int[] a,int value)

package com;

import java.util.Arrays;

/**
 * Arrays Class overview and common methods 
 *   A utility class that operates on an array. 
 *   It provides sorting, searching and other functions. 
 *  Members of the method 
 *  public static String toString(int[] a)  will int An array of type is converted to a string 
 *  public static void sort(int[] a)  To sort the array, the internal use of quick sort  
 *  public static int binarySearch(int[] a,int key) 2 A method to determine points 
 * @author  Xu Weiwei 
 *
 */
public class ArraysDemo {
 public static void main(String[] args) {
 int[] array = {3,44,2,546,74};
 //public static String toString(int[] a)  will int An array of type is converted to a string 
 System.out.println(Arrays.toString(array));//[3, 44, 2, 546, 74]
 
 //public static void sort(int[] a)  To sort the array, the internal use of quick sort 
 Arrays.sort(array);
 System.out.println(Arrays.toString(array));//[2, 3, 44, 74, 546]
 
 //public static int binarySearch(int[] a,int key) 2 A method to determine points 
 int index = Arrays.binarySearch(array, 5);
 System.out.println(index);//-3
 
 }

}

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