The clear() method of java.util.LinkedHashSet class is used to remove all of the elements from this set. The set will be empty after this call returns.
Syntax:
public void clear()
Return 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 Integer value import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
// Create the object of LinkedHashSet<Integer>
LinkedHashSet<Integer>
linkset = new LinkedHashSet<Integer>();
// populate hash set
linkset.add( 10 );
linkset.add( 20 );
linkset.add( 30 );
// print the LinkedHashSet
System.out.println( "LinkedHashSet: "
+ linkset);
// clear set values
// using clear() method
linkset.clear();
// print the LinkedHashSet
System.out.println( "LinkedHashSet after "
+ "use of clear() method: "
+ linkset);
}
catch (NullPointerException e) {
System.out.println( "Exception thrown : " + e);
}
}
} |
Output:
LinkedHashSet: [10, 20, 30] LinkedHashSet after use of clear() method: []
Example 2:
// Java program to demonstrate // clear() method // for String value import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
try {
// Create the object of LinkedHashSet<Integer>
LinkedHashSet<String>
linkset = new LinkedHashSet<String>();
// populate hash set
linkset.add( "A" );
linkset.add( "B" );
linkset.add( "C" );
// print the LinkedHashSet
System.out.println( "LinkedHashSet: "
+ linkset);
// clear set values
// using clear() method
linkset.clear();
// print the LinkedHashSet
System.out.println( "LinkedHashSet after "
+ "use of clear() method: "
+ linkset);
}
catch (NullPointerException e) {
System.out.println( "Exception thrown : " + e);
}
}
} |
Output:
LinkedHashSet: [A, B, C] LinkedHashSet after use of clear() method: []