Java – How to convert String to Char Array
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

From:Java – How to convert String to Char Array