Iterate Over a List in Java - Six different ways

In this section, we will show 6 different ways to iterate through a List in Java.

Using For Loop
Using doWhile
Using Advanced For Loop
Using Iterator
Using While Loop
Using Java 8 forEach

1. Using For Loop

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// iterate via "for loop"
System.out.println("==> For Loop Example.");
for (int i = 0; i < languages.size(); i++) {
    System.out.println(languages.get(i));
}

2. Using doWhile

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// iterate via "do while loop"
System.out.println("\n==> doWhile Loop Example....");
int j = 0;
do {
    System.out.println(languages.get(j));
    j++;
} while (j < languages.size());

3. Using Advanced For Loop

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// iterate via Advanced for loop
System.out.println("\n==> Advance For Loop Example..");
for (String temp : languages) {
    System.out.println(temp);
}

4. Using Iterator

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// iterate via "iterator loop"
System.out.println("\n==> Iterator Example...");
Iterator<String> iterator = languages.iterator();
while (iterator.hasNext()) {
    System.out.println(iterator.next());
}

5. Using While Loop

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// iterate via "while loop"
System.out.println("\n==> While Loop Example....");
int i = 0;
while (i < languages.size()) {
    System.out.println(languages.get(i));
    i++;
}

6. Java 8 forEach

// create list
List<String> languages = new ArrayList<String>();

// add 5 different values to list
languages.add("Java");
languages.add("Kotlin");
languages.add("Scala");
languages.add("Python");
languages.add("Go");

// From Java 8:forEach
System.out.println("\n==> collection stream() util....");
languages.forEach((temp) -> {
    System.out.println(temp);
});