The method  remove(Object o)  Deletes the first occurrence of the object o of ArrayList. It returns false if the specified item does not exist in the .

import java.util.ArrayList; 
import java.util.LinkedList; 
import java.util.List; 
import java.util.Vector; 

public class removeArrayList{ 
 
 public static void main(String[] args) {
 
 // Create an ArrayList< String> 
 ArrayList< String> aList = new ArrayList< String> (); 
 
 //add strings to ArrayList
 aList.add("1"); 
 aList.add("2"); 
 aList.add("3"); 
 
 System.out.println("ArrayList before deletion:"); 
 for(String e:aList)
 System.out.println(e); 
 
 aList.remove("2"); 
 System.out.println("ArrayList after deletion:"); 
 for(String e:aList)
 System.out.println(e); 
 
 }
}

Runtime:

ArrayList before removal: 
1
2
3
ArrayList after removal: 
1
3