Collection

We can use Collections.shuffle() method to shuffle elements in linked list in java. It generates different order of output every time when it is invoked. Syntax: Collections.shuffle(linkedList); Example: package com.w3schools;   import java.util.Collections; import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); … Read more

We can use Collections.reverse() method to reverse linked list in java. Syntax: Collections.reverse(linkedList); Example: package com.w3schools;   import java.util.Collections; import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); Collections.reverse(linkedList); System.out.println("Results after reverse operation:" + linkedList); } }package com.w3schools; import … Read more

We can use Collections.sort() method to sort linkedlist using comparator in java. We have to pass Comparator object in it. Example: package com.w3schools;   import java.util.Collections; import java.util.Comparator; import java.util.LinkedList;   class Employee{ private String name; private int salary;   public Employee(String name, int salary){ this.name = name; this.salary = salary; }   public String … Read more

We can use toArray() method to convert linked list to array in java. Syntax: linkedList.toArray(strArray); Example: package com.w3schools;   import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); String[] strArray = new String[linkedList.size()]; linkedList.toArray(strArray); System.out.println("Array created:"); for(String str:strArray){ System.out.println(str); … Read more

We can use clear() method to remove all elements from a linked list in java. Syntax: linkedList.clear(); Example: package com.w3schools;   import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); linkedList.clear(); System.out.println("LinkedList after clear :"+linkedList); } }package com.w3schools; import … Read more

We can use addAll() method to add all elements of a list to linkedlist in java. Syntax: linkedList.addAll(list); Example: package com.w3schools;   import java.util.ArrayList; import java.util.LinkedList; import java.util.List;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); List<String> list = new … Read more

We can use clone() method to copy or clone linked list in java. Syntax: linkedList.clone(); Example: package com.w3schools;   import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); System.out.println("Actual LinkedList:"+linkedList); LinkedList<String> copy = (LinkedList<String>) linkedList.clone(); System.out.println("Cloned LinkedList:"+copy); } }package com.w3schools; import … Read more

hasNext(): It returns true if the iteration has more elements. next(): It returns the next element in the iteration. Example: package com.w3schools;   import java.util.Iterator; import java.util.LinkedList;   public class Test { public static void main(String args[]){ LinkedList<String> linkedList = new LinkedList<String>(); linkedList.add("Jai"); linkedList.add("Mahesh"); linkedList.add("Naren"); linkedList.add("Vivek"); linkedList.add("Vishal"); linkedList.add("Hemant"); Iterator<String> iterator = linkedList.iterator(); while(iterator.hasNext()){ System.out.println(iterator.next()); } … Read more

We can use Collections.swap() method to swap two elements in an arraylist in java. We have to pass the indexes which we need to swap. Syntax: Collections.swap(arrayList, element1, element2); Example: package com.w3schools;   import java.util.ArrayList; import java.util.Collections;   public class Test { public static void main(String args[]){ ArrayList<String> arrayList = new ArrayList<String>(); arrayList.add("Jai"); arrayList.add("Mahesh"); arrayList.add("Vivek"); … Read more

We can use shuffle() method which generates different order of output, to shuffle elements in an arraylist in java. Syntax: Collections.shuffle(arrayList); Example: package com.w3schools;   import java.util.ArrayList; import java.util.Collections;   public class Test { public static void main(String args[]){ ArrayList<String> arrayList = new ArrayList<String>(); arrayList.add("Jai"); arrayList.add("Mahesh"); arrayList.add("Vivek"); arrayList.add("Naren"); arrayList.add("Hemant"); arrayList.add("Vishal"); System.out.println("Actual ArrayList:"+arrayList); Collections.shuffle(arrayList); System.out.println("Results after … Read more