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Write a Java Program to Iterate over an ArrayList
PROGRAM: Java Program to Iterate over an ArrayList
/*Java Program to Iterate over an ArrayList*/
1: Iterate through ArrayList using for loop
import java.util.ArrayList;
class Main {
public static void main(String[] args) {
// Creating an array list
ArrayList<String> languages = new ArrayList<>();
languages.add(“Java”);
languages.add(“JavaScript”);
languages.add(“Python”);
System.out.println(“ArrayList: ” + languages);
// Using for loop
System.out.println(“Iterating over ArrayList using for loop: “);
for(int i = 0; i < languages.size(); i++) {
System.out.print(languages.get(i));
System.out.print(“, “);
}
}
}
2: Iterate through ArrayList using for-each loop
import java.util.ArrayList;
class Main {
public static void main(String[] args) {
// Creating an array list
ArrayList<String> languages = new ArrayList<>();
languages.add(“Java”);
languages.add(“JavaScript”);
languages.add(“Python”);
System.out.println(“ArrayList: ” + languages);
// Using forEach loop
System.out.println(“Iterating over ArrayList using for-each loop:”);
for(String language : languages) {
System.out.print(language);
System.out.print(“, “);
}
}
}
3: Iterate over ArrayList using listIterator()
import java.util.ArrayList;
import java.util.ListIterator;
class Main {
public static void main(String[] args) {
// Creating an ArrayList
ArrayList<Integer> numbers = new ArrayList<>();
numbers.add(1);
numbers.add(3);
numbers.add(2);
System.out.println(“ArrayList: ” + numbers);
// Creating an instance of ListIterator
ListIterator<Integer> iterate = numbers.listIterator();
System.out.println(“Iterating over ArrayList:”);
while(iterate.hasNext()) {
System.out.print(iterate.next() + “, “);
}
}
}
