Convert String Object To Character Array

This example will show you how to use the java String class toCharArray() method to convert a Java String object to a character array.

1. How To Convert Java String Object To Character Array Example Source Code.

1. ConvertStringToCharArray.java

   public class ConvertStringToCharArray {
   
   	public static void main(String[] args) {
   		
   		/* Declare and initiate the str object with assigned value. */
   		String str = "Java is a popular programming language.";
   		
   		/* Declare a char array without initial value. */
   		char charArr[];
   		
   		/* Invoke toCharArray() method to convert str to char array. */
   		charArr = str.toCharArray();
   		
   		/* Get char count in the array. */
   		int arrLen = charArr.length;
   		
   		/* Declare a Character object array. */
   		Character chaObjArr[] = new Character[arrLen];
   		
   		/* Loop to print each char in the array in reverse order. */
   		for(int i=arrLen-1;i>=0;i--)
   		{
   			/* Get the char value at the specified index. */
   			char cha = charArr[i];
   			
   			/* Print out the char. */
   			System.out.print(cha + " ");
   			
   			/* Cast the char to upper case Character object and save in chaObjArr. */
   			chaObjArr[i] = Character.toUpperCase(cha);
   		}
   		
   		System.out.println("");
   
   		/* Loop in chaObjArr and print out each upper case character. */
   		for(int i=0;i<arrLen;i++)
   		{
   			/* Get each Character object. */
   			Character chaObj = chaObjArr[i];
   			
   			/* Print it's data as String. */
   			System.out.print(chaObj.toString());
   		}
   		
   	}
   
   }

2. Below is the output when you run the above java code.

   . e g a u g n a l   g n i m m a r g o r p   r a l u p o p   a   s i   a v a J 
   JAVA IS A POPULAR PROGRAMMING LANGUAGE.