Here are four ways to loop a List in Java.
1. Iterator loop
2. For loop
3. For loop (Advance)
4. While loop
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
public class ArrayToList {
public static void main(String[] argv) {
String sArray[] = new String[] { "Array 1", "Array 2", "Array 3" };
// convert array to list
List<String> lList = Arrays.asList(sArray);
// iterator loop
System.out.println("#1 iterator");
Iterator<String> iterator = lList.iterator();
while (iterator.hasNext()) {
System.out.println(iterator.next());
}
// for loop
System.out.println("#2 for");
for (int i = 0; i < lList.size(); i++) {
System.out.println(lList.get(i));
}
// for loop advance
System.out.println("#3 for advance");
for (String temp : lList) {
System.out.println(temp);
}
// while loop
System.out.println("#4 while");
int j = 0;
while (j < lList.size()) {
System.out.println(lList.get(j));
j++;
}
}
}
Output
#1 iterator
Array 1
Array 2
Array 3
#2 for
Array 1
Array 2
Array 3
#3 for advance
Array 1
Array 2
Array 3
#4 while
Array 1
Array 2
Array 3
