本文从比较排序相关的两个接口(Comparable和Comparator)讲起,并以代码实例的形式,讲解了Array、List、Stream排序的方法,这应该可以覆盖大部分Java排序的使用场景。 对于其它集合类如Set和Map,一样可以进行排序处理,可以将它们转化为Stream然后再进行排序。
Java排序 两个接口 Comparable 先上代码: packagejava.lang;publicinterfaceComparable<T> {publicintcompareTo(T o); } 可以看出这个接口只有一个方法,这个方法只有一个参数,实现了这个接口的类就可以和同类进行比较了。这个方法所实现的,就是比较法则,也是说,它表示如何对两个对象进行比较。 它返回的是一个整数in...
Reverse Sorted : [Dean, Charles, Brian, Amanda, Alex] 2. Arrays.sort() – Java 7 Arrays.sort()provides similar functionality asStream.sorted()if you are still in Java 7. // Unsorted string array String[] strArray = {"Alex","Charles","Dean","Amanda","Brian"}; // Sorting the stri...
import java.util.Arrays; public class SecondLargestUsingSorting { public static int findSecondLargest(int[] array) { if (array==null || array.length < 2) { return -1; } Arrays.sort(array); for (int i = array.length - 2; i >= 0; i--) { if (array[i] != array[array.length...
Java排序 两个接口 Comparable 先上代码: packagejava.lang; publicinterfaceComparable<T>{ publicintcompareTo(T o); } 可以看出这个接口只有一个方法,这个方法只有一个参数,实现了这个接口的类就可以和同类进行比较了。这个方法所实现的,就是比较法则,也是说,它表示如何对两个对象进行比较。
Java program to sort an array of integers in ascending order usingArrays.sort()method. //Unsorted arrayInteger[]numbers=newInteger[]{15,11,...};//Sort the arrayArrays.sort(numbers); 2.2. Descending Order Java providesCollections.reverseOrder()comparatorto reverse the default sorting behavior in...
import java.util.Arrays; public class Sorting { public static void main(String args[]) { String[] strNames = new String[] { "Beans", "Jelly", "Drive", "Language", "Mark", "Run" }; Arrays.sort(strNames); System.out.println("String array after sorting:"); for (...
Leverage built-in collection utilities for sorting, searching, and filtering. Advertisement - This is a modal window. No compatible source was found for this media. Using Add() method Create an empty list. Iterate through the for loop the array and add each item to the list using its add(...
you’re probably familiar with for loops. For loops are typically used with primitive type arrays that contain either string or integer values. You use these loops when you need to manipulate or read each value in the array. For loops are a part of almost every Java program, and you’re...
// Rust program to sort an array in ascending order// using selection sortfnmain() {letmutarr:[usize;5]=[5,1,23,11,26];letmuti:usize=0;letmutj:usize=0;letmutmin:usize=0;letmuttemp:usize=0; println!("Array before sorting: {:?}",arr);whilei<=4{ min=i; j=i+1;whilej<=...