Java While Loop
A while statement executes a block of statements until the condition satisfied. A Boolean expression (condition) is tested before each iteration of the loop. When we want to execute a number of lines, multiple times based on a condition we use while loop.
Here this flow chart will describe a while loop better-
Syntax
while(condition){
//code to be executed
}
public class mywhileloop {
public static void main(String[] args) {
int d=1;
while(d<=20){
System.out.println(d);
d++;
}
}
}Example Output
Java Infinite While Loops
An infinite while loop in Java is a set of code that would repeat itself forever unless the system crashes.
Syntax
while(true){
// your code here
}
We can implement an infinite loop using a while statement-
Note: ctrl+c to exit from the program
public class demoinfinitive {
public static void main(String[] args) {
while(true){
System.out.println("Java Point Tutorial");
}
}
}Example Output
Java While Loop Array List Example
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
public class MyWhileLoop {
public static void main(String args[]) {
List ac = new ArrayList();
ac.add("Tom");
ac.add("Johny");
ac.add("Micheal");
ac.add("Ricky");
ac.add("San");
ac.add("Kivi");
Collections.sort(ac);
Iterator it = ac.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}
}Example Output