// Java program to illustratereverse() method// of Collections class over ArrayList// Importing utility classesimportjava.util.*;// Main classpublicclassGFG{// main driver methodpublicstaticvoidmain(String[] arg
程序2:显示NullPointerException // Java program to illustrate retainAll() method importjava.util.*; publicclassNullPointerExample{ publicstaticvoidmain(String[]args) { // Creating an arraylist // and assigning null to it AbstractCollection<Object>set1=null; // creating another arraylist AbstractColle...
方案一: // Java program to illustrate CopyOnWriteArrayList // containsAll() method importjava.util.concurrent.CopyOnWriteArrayList; importjava.util.*; publicclassGFG1{ publicstaticvoidmain(String[]args) { CopyOnWriteArrayList<String>ArrLis1 =newCopyOnWriteArrayList<String>(); // Add elements ArrLis1.add...
// Java program to Illustrate Reversal of Array // using reverse() method of Collections class // Importing utility classes import java.util.*; // Main class public class GFG { // Main driver method public static void main(String[] args) { // Creating input integer array Integer arr[]...
The following examples illustrate how to set the NIO size to 1024 KB in different units: -XX:MaxDirectMemorySize=1m -XX:MaxDirectMemorySize=1024k -XX:MaxDirectMemorySize=1048576 -XX:NativeMemoryTracking=mode Specifies the mode for tracking JVM native memory usage. Possible mode arguments for ...
//Java program to illustrate the working method of a Comparator interface and the Collections.sort() to sort according to the user defined criteria.importjava.util.*;importjava.lang.*;importjava.io.*;classStudent{introllno;Stringname,address;publicStudent(introllno,Stringname,Stringaddress){this...
// Java program to illustrate the thread-safe ArrayList.importjava.io.*;importjava.util.Iterator;importjava.util.concurrent.CopyOnWriteArrayList;classGFG{publicstaticvoidmain(String[]args){// creating a thread-safe Arraylist.CopyOnWriteArrayList<String>threadSafeList=newCopyOnWriteArrayList<String>();// Add...
// Java Program to Illustrate Lambda Expression // with Multiple Parameter // Importing required classes import java.util.*; // Main class class GFG { // main driver method public static void main(String[] args) { // Creating a List of integer type ...
// Java program to illustrate the thread-safe ArrayList.importjava.io.*;importjava.util.Iterator;importjava.util.concurrent.CopyOnWriteArrayList;classGFG{ publicstaticvoidmain (String[] args) {// creating a thread-safe Arraylist.CopyOnWriteArrayList<String> threadSafeList =newCopyOnWriteArrayList<String>(...
// Java program to illustrate// Fail-Safe Iterator which// does not create separate copyimportjava.util.concurrent.ConcurrentHashMap;importjava.util.Iterator;publicclass...