CharArrayReader close() method in Java with Examples
Last Updated :
13 Feb, 2019
The close() method of CharArrayReader Class in Java is used to close the stream and release the resources that were busy in the stream, if any. This method has following results:
- If the stream is open, it closes the stream releasing the resources
- If the stream is already closed, it will have no effect.
- If any read or other similar operation is performed on the stream, after closing, it raises IOException
Syntax:
public abstract void close()
Parameters: This method does not accepts any parameters
Return Value: This method do not returns any value.
Exception: This method throws IOException if some error occurs while input output.
Below methods illustrates the working of close() method:
Program 1:
import java.io.*;
import java.util.*;
class GFG {
public static void main(String[] args)
{
try {
char [] str = { 'G' , 'e' , 'e' , 'k' , 's' ,
'F' , 'o' , 'r' ,
'G' , 'e' , 'e' , 'k' , 's' };
CharArrayReader reader
= new CharArrayReader(str);
int ch;
for ( int i = 0 ; i < 5 ; i++) {
ch = reader.read();
System.out.println( "\nInteger value "
+ "of character read: "
+ ch);
System.out.println( "Actual "
+ "character read: "
+ ( char )ch);
}
reader.close();
System.out.println( "Stream Closed." );
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Integer value of character read: 71
Actual character read: G
Integer value of character read: 101
Actual character read: e
Integer value of character read: 101
Actual character read: e
Integer value of character read: 107
Actual character read: k
Integer value of character read: 115
Actual character read: s
Stream Closed.
Program 2:
import java.io.*;
import java.util.*;
class GFG {
public static void main(String[] args)
{
try {
char [] str = { 'G' , 'e' , 'e' , 'k' , 's' };
CharArrayReader reader
= new CharArrayReader(str);
reader.close();
System.out.println( "Stream Closed." );
System.out.println( "Is CharArrayReader ready "
+ "to be read"
+ reader.ready());
}
catch (Exception e) {
System.out.println(e);
}
}
}
|
Output:
Stream Closed.
java.io.IOException: Stream closed
Reference: https://docs.oracle.com/javase/9/docs/api/java/io/CharArrayReader.html#close–
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