Remove All Element From Arraylist Example

 Remove All Element From Arraylist Example

Method 1:

We can remove all element of arraylist using clear() method . clear() removes all element from the list and return empty list.

import java.util.ArrayList;

public class RemoveAll {

public static void main(String[] args) {

ArrayList<String> arr = new ArrayList<String>();

// add element in arraylist
arr.add(“c”);
arr.add(“c”);
arr.add(“php”);
arr.add(“html”);
arr.add(“java”);

// print arraylist
System.out.println(“arrayList is = ” + arr);

/*
* Removes all of the elements from this list.
*/
arr.clear();

System.out.println(“After Clear arrayList is=”+arr);
}

}

Output:

arrayList is = [c, c, php, html, java]

After Clear arrayList is=[]

Method 2:

import java.util.ArrayList;

public class RemoveAll2 {

public static void main(String[] args) {
ArrayList<String> arr = new ArrayList<String>();
// add element in arraylist
arr.add(“c”);
arr.add(“php”);
arr.add(“html”);
arr.add(“java”);
// print arraylist
System.out.println(“Before Removing arrayList is = ” + arr);

arr.removeAll(arr);
System.out.println(“After Remove all element of aarraylist is=”+arr);

}

}

Output:

Before Removing arrayList is = [c, php, html, java]

After Remove all element of aarraylist is=[]

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Storing Java Object In ArrayList

 

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