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:
// Java program to demonstrate // clear() method // for String value import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
// Creating object of AbstractList<String>
AbstractList<String>
arrlist1 = new ArrayList<String>();
// Populating arrlist1
arrlist1.add( "A" );
arrlist1.add( "B" );
arrlist1.add( "C" );
arrlist1.add( "D" );
arrlist1.add( "E" );
// print the ArrayList
System.out.println( "Original ArrayListlist : "
+ arrlist1);
// Removing all the elements
// using clear() method
arrlist1.clear();
// print the new ArrayList
System.out.println( "New ArrayList : "
+ arrlist1);
}
catch (NullPointerException e) {
System.out.println( "Exception thrown : "
+ e);
}
}
} |
Output:
Original ArrayListlist : [A, B, C, D, E] New ArrayList : []
Example 2:
// Java program to demonstrate // clear() method // for Integer value import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
// Creating object of AbstractList<Integer>
AbstractList<Integer>
arrlist1 = new ArrayList<Integer>();
// Populating arrlist1
arrlist1.add( 10 );
arrlist1.add( 20 );
arrlist1.add( 30 );
arrlist1.add( 40 );
arrlist1.add( 50 );
// print the ArrayList
System.out.println( "Original ArrayListlist : "
+ arrlist1);
// Removing all the elements
// using clear() method
arrlist1.clear();
// print the new ArrayList
System.out.println( "New ArrayList : "
+ arrlist1);
}
catch (NullPointerException e) {
System.out.println( "Exception thrown : " + e);
}
}
} |
Output:
Original ArrayListlist : [10, 20, 30, 40, 50] New ArrayList : []