- Java.io package classes
- Java.io - Home
- Java.io - BufferedInputStream
- Java.io - BufferedOutputStream
- Java.io - BufferedReader
- Java.io - BufferedWriter
- Java.io - ByteArrayInputStream
- Java.io - ByteArrayOutputStream
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- Java.io - Console
- Java.io - DataInputStream
- Java.io - DataOutputStream
- Java.io - File
- Java.io - FileDescriptor
- Java.io - FileInputStream
- Java.io - FileOutputStream
- Java.io - FilePermission
- Java.io - FileReader
- Java.io - FileWriter
- Java.io - FilterInputStream
- Java.io - FilterOutputStream
- Java.io - FilterReader
- Java.io - FilterWriter
- Java.io - InputStream
- Java.io - InputStreamReader
- Java.io - LineNumberInputStream
- Java.io - LineNumberReader
- Java.io - ObjectInputStream
- Java.io - ObjectInputStream.GetField
- Java.io - ObjectOutputStream
- io - ObjectOutputStream.PutField
- Java.io - ObjectStreamClass
- Java.io - ObjectStreamField
- Java.io - OutputStream
- Java.io - OutputStreamWriter
- Java.io - PipedInputStream
- Java.io - PipedOutputStream
- Java.io - PipedReader
- Java.io - PipedWriter
- Java.io - PrintStream
- Java.io - PrintWriter
- Java.io - PushbackInputStream
- Java.io - PushbackReader
- Java.io - RandomAccessFile
- Java.io - Reader
- Java.io - SequenceInputStream
- Java.io - SerializablePermission
- Java.io - StreamTokenizer
- Java.io - StringBufferInputStream
- Java.io - StringReader
- Java.io - StringWriter
- Java.io - Writer
- Java.io package extras
- Java.io - Interfaces
- Java.io - Exceptions
- Java.io package Useful Resources
- Java.io - Discussion
Java.io.FileInputStream.finalize() Method
Description
The java.io.FileInputStream.finalize() method ensures that the close method of this file input stream is called when there are no more references to it.
Declaration
Following is the declaration for java.io.FileInputStream.finalize() method −
protected void finalize()
Parameters
NA
Return Value
This method does not return any value.
Exception
IOException − If an I/O error occurs.
Example
The following example shows the usage of java.io.FileInputStream.finalize() method.
package com.tutorialspoint; import java.io.FileInputStream; import java.io.IOException; public class FileInputStreamAvailable extends FileInputStream { public FileInputStreamAvailable() throws Exception { super("C://test.txt"); } public static void main(String[] args) throws IOException { int i; char c; try { // create new File input stream FileInputStreamAvailable fisa = new FileInputStreamAvailable(); // read byte from file input stream i=fisa.read(); // converts int to char c = (char)i; // prints character System.out.println(c); // finalize method invoked fisa.finalize(); // method revoked after finalize metod i = fisa.read(); c = (char)i; System.out.println(c); } catch(Exception ex) { // if any error occurs System.out.print("Error: read() invoked after finalize()"); } finally { // releases all system resources from the streams if(fis!=null) fis.close(); } } }
Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program −
ABCDE
Let us compile and run the above program, this will produce the following result −
Error: read() invoked after finalize()
java_io_fileinputstream.htm
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