AbstractSequentialList removeAll() method in Java with Example
The removeAll() method of java.util.AbstractSequentialList class is used to remove from this list all of its elements that are contained in the specified collection.
Syntax:
public boolean removeAll(Collection c)
Parameters: This method takes collection c as a parameter containing elements to be removed from this list.
Returns Value: This method returns true if this list changed as a result of the call.
Exception: This method throws NullPointerException if this list contains a null element and the specified collection does not permit null elements (optional), or if the specified collection is null.
Below are the examples to illustrate the removeAll() method.
Example 1:
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
AbstractSequentialList<Integer>
arrlist1 = new LinkedList<Integer>();
arrlist1.add( 1 );
arrlist1.add( 2 );
arrlist1.add( 3 );
arrlist1.add( 4 );
arrlist1.add( 5 );
System.out.println( "AbstractSequentialList before "
+ "removeAll() operation : "
+ arrlist1);
AbstractSequentialList<Integer>
arrlist2 = new LinkedList<Integer>();
arrlist2.add( 1 );
arrlist2.add( 2 );
arrlist2.add( 3 );
System.out.println( "Collection Elements"
+ " to be removed : "
+ arrlist2);
arrlist1.removeAll(arrlist2);
System.out.println( "AbstractSequentialList after "
+ "removeAll() operation : "
+ arrlist1);
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
AbstractSequentialList before removeAll() operation : [1, 2, 3, 4, 5]
Collection Elements to be removed : [1, 2, 3]
AbstractSequentialList after removeAll() operation : [4, 5]
Example 2: For NullPointerException
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
AbstractSequentialList<Integer>
arrlist1 = new LinkedList<Integer>();
arrlist1.add( 1 );
arrlist1.add( 2 );
arrlist1.add( 3 );
arrlist1.add( 4 );
arrlist1.add( 5 );
System.out.println( "AbstractSequentialList before "
+ "removeAll() operation : "
+ arrlist1);
AbstractSequentialList<Integer>
arrlist2 = null ;
System.out.println( "Collection Elements"
+ " to be removed : "
+ arrlist2);
System.out.println( "\nTrying to pass "
+ "null as a specified element\n" );
arrlist1.removeAll(arrlist2);
System.out.println( "AbstractSequentialList after "
+ "removeAll() operation : "
+ arrlist1);
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
AbstractSequentialList before removeAll() operation : [1, 2, 3, 4, 5]
Collection Elements to be removed : null
Trying to pass null as a specified element
java.lang.NullPointerException
Last Updated :
30 Sep, 2019
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