The length() method of java.nio.CharBuffer Class is used to return the length of this character buffer. When viewed as a character sequence, the length of a character buffer is simply the number of characters between the position (inclusive) and the limit (exclusive); that is, it is equivalent to remaining().
Syntax:
public final int length()
Return Value: This method returns the length of this character buffer.
Below are the examples to illustrate the length() method:
Examples 1:
// Java program to demonstrate // length() method import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declare and initialize the char array
char [] cb = { 'a' , 'b' , 'c' };
// wrap the char array into CharBuffer
// using wrap() method
CharBuffer charBuffer = CharBuffer.wrap(cb);
// Get the length of the charBuffer
// using length() method
int length = charBuffer.length();
// print the byte buffer
System.out.println( "CharBuffer is : "
+ Arrays.toString(
charBuffer.array())
+ "\nLength: "
+ length);
}
} |
Output:
CharBuffer is : [a, b, c] Length: 3
Examples 2:
// Java program to demonstrate // length() method import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// defining and allocating CharBuffer
// using allocate() method
CharBuffer charBuffer
= CharBuffer.allocate( 4 );
// append char value in charBuffer
// using append() method
charBuffer.append( 'a' );
charBuffer.append( 'b' );
// print the char buffer
System.out.println( "CharBuffer before append : "
+ Arrays.toString(
charBuffer.array())
+ "\nLength: "
+ charBuffer.length());
// append char value in charBuffer
// using append() method
charBuffer.append( 'c' );
// print the char buffer
System.out.println( "\nCharBuffer after append : "
+ Arrays.toString(
charBuffer.array())
+ "\nLength: "
+ charBuffer.length());
}
} |
Output:
CharBuffer before append : [a, b,, ] Length: 2 CharBuffer after append : [a, b, c, ] Length: 1
Reference: https://docs.oracle.com/javase/9/docs/api/java/nio/CharBuffer.html#length–