// Java program to illustratereverse() method// of Collections class over ArrayList// Importing utility classesimportjava.util.*;// Main classpublicclassGFG{// main driver methodpublicstaticvoidmain(String[] args){// Let us create a list of stringsList<String> mylist =newArrayList<String>();...
// Java program to Illustrate checkedCollection() method // of Collection class for an Integer value // Importing classes import java.util.*; // Main class public class GFG { // Main driver method public static void main(String[] argv) throws Exception { // Try block to check for ...
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...
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...
// 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[]...
// 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 The Working of a reverseOrder() method of the Collections class To sort a list by using the manner of descending order import java.util.*; public class ARBRDD { public static void main(String[] args){ ArrayList<Integer> al = new ArrayList<Integer>(); al.ad...
//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. import java.io.*; import java.util.Iterator; import java.util.concurrent.CopyOnWriteArrayList; class GFG { public static void main (String[] args) { // creating a thread-safe Arraylist. CopyOnWriteArrayList<String> threadSafeList = new Cop...
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 ...