String methods – getBytes() and getChars()

In this post, we will discuss about String methods – getBytes() and getChars().Let’s look at them one by one with examples.

getbytes():

Encodes this String into a sequence of bytes using the platform’s default charset, storing the result into a new byte array.It throws UnsupportedEncodingException – If the specified charset is not supported.

public class StringMethodsEx {

	public static void main(String[] args) {
		
		String val1 = "Hello world!!";	
		byte[] a = val1.getBytes();   // array of bytes
		
		for(byte b : a){
			System.out.print(b+"-");
		}
	}
}

byte[] getBytes(Charset charset):

Instead of default character set, We can also specify the character set as well in getByte() method.

public class StringMethodsEx {

	public static void main(String[] args)   {
		try{
		String val1 = "Hello world!!";	
		byte[] a = val1.getBytes("UTF-16");   // array of bytes
		
		for(byte b : a){
			System.out.print(b+"-");
		}
		}catch(UnsupportedEncodingException e){
			System.out.println("Error msg " +e.getMessage());
		}
	}
}

void getChars(int srcBegin,int srcEnd,char[] dst,int dstBegin) :

This method is used to copy string into destination array.

srcBegin – index of the first character in the string to copy.
srcEnd – index after the last character in the string to copy.
dst – Destination array of characters in which the characters from String gets copied.
dstBegin – The index in Array starting from where the chars will be pushed into the Array.

public class StringMethodsEx {

	public static void main(String[] args) {
		
		String val1 = "Hello world!!";	
		char a[] = new char[8];

		val1.getChars(3, 10, a, 0);
		for(char c: a){
			System.out.print(c+"-");
		}
	}
}