JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to convert inputstream to reader or BufferedReader?


Sometimes we need to convert inputstream object to reader object, so that we can handle the stream according to our logic. Below example shows how to convert inputstream to bufferedreader object.


package com.java2novice.files;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

public class MyIstoBr {

	public static void main(String a[]){
		
		InputStream is = null;
		BufferedReader bfReader = null;
		try {
			is = new FileInputStream("C:/sample.txt");
			bfReader = new BufferedReader(new InputStreamReader(is));
			String temp = null;
			while((temp = bfReader.readLine()) != null){
				System.out.println(temp);
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

Output:
This is a test file, here we are
trying to read a file using BufferedReader.
We are trying to convert input stream object 
to reader object.
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Prevent a method from being overridden
By specifying final keyword to the method you can avoid overriding in a subcalss. Similarlly one can use final at class level to prevent creating subclasses.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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