Java Examples: How to empty an ArrayList in java.

Question:

How to empty an ArrayList?

Answer:

Use the method clear().

http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html#clear()

Code:

import java.util.ArrayList;
 
public class EmptyArrayList { 
  public static void main(String[] args) { 
    ArrayList<String> list = new ArrayList<String>();
 
    list.add("John");
    list.add("Ringo");
    list.add("George");
 
    System.out.println("ArrayList: "+ list);
 
    list.add("Paul");
    System.out.println("ArrayList: "+ list);
 
    list.add("Me");
    list.clear();
    System.out.println("ArrayList: "+ list);
  } 
}

Output:

$ java EmptyArrayList
ArrayList: [John, Ringo, George]
ArrayList: [John, Ringo, George, Paul]
ArrayList: []