Usage and example of Java ArrayList toString()

Java ArrayList Methods

The toString() method of Java ArrayList converts an arraylist to a String.

The syntax of toString() method is:

arraylist.toString()

Parameters of toString()

The toString() method does not take any parameters.

Return value of toString()

• Return the string representation of arraylist

Example: Convert ArrayList to String

import java.util.ArrayList;
class Main {
　　public static void main(String[] args) {
　　　　ArrayList<String> languages = new ArrayList<>();
　　　　//Add elements to ArrayList
　　　　languages.add("Java");
　　　　languages.add("Python");
　　　　languages.add("C");
　　　　System.out.println("ArrayList: ",　+　languages);
　　　　//Convert ArrayList to String
　　　　String list = languages.toString();
　　　　System.out.println("String: ",　+　list);
　　}
}

Output Result

ArrayList: [Java, Python, C]
String: [Java, Python, C]

In the above example, we created an array list named languages. Note this line,

String list = languages.toString();

In this example, we have used the toString() method to convert the arraylist to a string. This method converts the entire arraylist to a single String.

NoteThe ArrayList class does not have its own toString() method. It overrides the method from the Object class instead.

Java ArrayList Methods