AbstractQueue clear() method in Java with examples Last Updated : 26 Nov, 2018 Comments Improve Suggest changes Like Article Like Report The clear() method of AbstractQueue removes all of the elements from this queue. The queue will be empty after this call returns. Syntax: public void clear() Parameters: This method does not accept any parameters. Returns: The method does not returns anything. Below programs illustrate clear() method: Program 1: Java // Java program to illustrate the // AbstractQueue clear() method import java.util.*; import java.util.concurrent.LinkedBlockingQueue; public class GFG1 { public static void main(String[] argv) throws Exception { // Creating object of AbstractQueue<Integer> AbstractQueue<Integer> AQ1 = new LinkedBlockingQueue<Integer>(); // Populating AQ1 AQ1.add(10); AQ1.add(20); AQ1.add(30); AQ1.add(40); AQ1.add(50); // print AQ System.out.println("AbstractQueue1 contains : " + AQ1); AQ1.clear(); System.out.println("AbstractQueue1 : " + AQ1); } } Output: AbstractQueue1 contains : [10, 20, 30, 40, 50] AbstractQueue1 : [] Program 2: Java // Java program to illustrate the // AbstractQueue clear() method import java.util.*; import java.util.concurrent.LinkedBlockingQueue; public class GFG1 { public static void main(String[] argv) throws Exception { // Creating object of AbstractQueue<String> AbstractQueue<String> AQ1 = new LinkedBlockingQueue<String>(); // Populating AQ1 AQ1.add("gopal"); AQ1.add("gfg"); AQ1.add("java"); // print AQ System.out.println("AbstractQueue1 contains : " + AQ1); AQ1.clear(); System.out.println("AbstractQueue1 : " + AQ1); } } Output: AbstractQueue1 contains : [gopal, gfg, java] AbstractQueue1 : [] Reference: https://docs.oracle.com/javase/8/docs/api/java/util/AbstractQueue.html#clear-- Comment More infoAdvertise with us Next Article AbstractQueue clear() method in Java with examples G gopaldave Follow Improve Article Tags : Java Java-Collections Java - util package Java-Functions java-AbstractQueue +1 More Practice Tags : JavaJava-Collections Similar Reads AbstractSet clear() method in Java with Example The clear() method of AbstractSet in Java is used to remove all the elements from a set. The set will be empty after this call returns. Syntax: public void clear() Parameters: This function has no parameters. Returns: The method does not return any value. It removes all the elements in the set and m 2 min read AbstractList clear() method in Java with Examples The clear() method of java.util.AbstractList class is used to remove all of the elements from this list. The list will be empty after this call returns. Syntax: public void clear() Returns Value: This method does not return anything. Below are the examples to illustrate the clear() method. Example 1 2 min read AbstractMap clear() Method in Java with Examples The AbstractMap.clear() method in Java is used to clear and remove all of the elements or mappings from a specified Map. Syntax: AbstractMap.clear() Parameters: The method does not accept any parameters. Return Value: The method does not return any value. Below programs are used to illustrate the wo 2 min read AbstractSequentialList clear() method in Java with Example The clear() method of AbstractSequentialList in Java is used to remove all the elements from a list. The list will be empty after this call returns. Syntax: public void clear() Parameters: This function has no parameters. Returns: The method does not return any value. It removes all the elements in 2 min read AbstractCollection clear() Method in Java with Examples The clear() method of Java AbstractCollection in Java is used to remove all of the elements from the Collection. Using the clear() method only clears all the element from the collection and does not delete the collection. In other words, it can be said that the clear() method is used to only empty a 2 min read Like