LinkedBlockingDeque equals() method in Java with Example

Last Updated : 24 Dec, 2018
The equals() method of java.util.LinkedBlockingDeque class is used to compare the specified object with this LinkedBlockingDeque for equality. Returns true if and only if the specified object is also a LinkedBlockingDeque, both LinkedBlockingDeques have the same size, and all corresponding pairs of elements in the two LinkedBlockingDeques are equal. (Two elements e1 and e2 are equal if (e1==null ? e2==null : e1.equals(e2)).) In other words, two LinkedBlockingDeques are defined to be equal if they contain the same elements in the same order. Syntax: 
public boolean equals(Object o)
Parameters: This method takes the object o as a parameter to be compared for equality with this LinkedBlockingDeque. Returns Value: This method returns true if the specified object is equal to this LinkedBlockingDeque. Below examples illustrates the LinkedBlockingDeque.equals() method: Program 1: Java 
// Java Program Demonstrate equals()
// method of LinkedBlockingDeque

import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<Integer> LBD1
            = new LinkedBlockingDeque<Integer>();

        // Add numbers to end of LinkedBlockingDeque
        LBD1.add(7855642);
        LBD1.add(35658786);
        LBD1.add(5278367);
        LBD1.add(74381793);

        System.out.println("Linked Blocking Deque 1: " + LBD1);

        // create another object of LinkedBlockingDeque
        LinkedBlockingDeque<String> LBD2
            = new LinkedBlockingDeque<String>();

        // Add numbers to end of LinkedBlockingDeque
        LBD2.add("1");
        LBD2.add("2");
        LBD2.add("3");
        LBD2.add("4");

        System.out.println("Linked Blocking Deque 2: " + LBD2);

        // using equals() function
        System.out.println("Are both Linked Blocking Deque equal: "
                           + LBD1.equals(LBD2));
    }
}
Output: 
Linked Blocking Deque 1: [7855642, 35658786, 5278367, 74381793]
Linked Blocking Deque 2: [1, 2, 3, 4]
Are both Linked Blocking Deque equal: false
Program 2: Java 
// Java Program Demonstrate equals()
// method of LinkedBlockingDeque
// when the list contains characters

import java.util.concurrent.LinkedBlockingDeque;
import java.util.*;

public class GFG {
    public static void main(String[] args)
        throws IllegalStateException
    {

        // create object of LinkedBlockingDeque
        LinkedBlockingDeque<String> LBD1
            = new LinkedBlockingDeque<String>();

        // Add numbers to end of LinkedBlockingDeque
        LBD1.add("1");
        LBD1.add("2");
        LBD1.add("3");
        LBD1.add("4");

        System.out.println("Linked Blocking Deque 1: " + LBD1);

        // using equals() function
        System.out.println("Is LBD1 equal to LBD1: "
                           + LBD1.equals(LBD1));
    }
}
Output: 
Linked Blocking Deque 1: [1, 2, 3, 4]
Is LBD1 equal to LBD1: true
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