In Java, you can use String.toCharArray() to convert a String into a char array.

StringToCharArray.java

package com.mkyong.utils;

public class StringToCharArray {

    public static void main(String[] args) {

        String password = "password123";

        char[] passwordInCharArray = password.toCharArray();

        for (char temp : passwordInCharArray) {
            System.out.println(temp);
        }

    }

}

Output

p
a
s
s
w
o
r
d
1
2
3

Java 8 – Convert String to Stream Char

For Java 8, you can uses .chars() to get the IntStream, and convert it to Stream Char via .mapToObj


package com.mkyong.utils;
package com.mkyong.pageview;

public class Test {

    public static void main(String[] args) {

        String password = "password123";

        password.chars() //IntStream
                .mapToObj(x -> (char) x)//Stream<Character>
                .forEach(System.out::println);

    }

}

Output

p
a
s
s
w
o
r
d
1
2
3

References

  1. JavaDoc – toCharArray
  2. Why is String.chars() a stream of ints in Java 8?