Below step-by-step procedure explains how to write to the
file.
Step 1: Get the
FileChannel from FileOutputStream.
FileOutputStream fout = new FileOutputStream(filePath)
FileChannel fileChannel = fout.getChannel();
Step 2: Fill the
buffer with the content.
byte[] contentBytes = content.getBytes();
ByteBuffer byteBuffer =
ByteBuffer.allocate(contentBytes.length);
byteBuffer.put(contentBytes);
byteBuffer.flip();
Step 3: Write the
content to the file.
fileChannel.write(byteBuffer);
Find the below working application.
Test.java
package com.sample.app; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; public class Test { private static final String FILE_PATH = "C:\\Users\\krishna\\Documents\\Study\\demo.txt"; public static void writeContentToFile(String content, String filePath) throws FileNotFoundException, IOException { if (content == null) { return; } if (filePath == null || filePath.isEmpty()) { throw new IllegalArgumentException("filePath shouldn't be null or empty"); } try (FileOutputStream fout = new FileOutputStream(filePath)) { byte[] contentBytes = content.getBytes(); ByteBuffer byteBuffer = ByteBuffer.allocate(contentBytes.length); byteBuffer.put(contentBytes); FileChannel fileChannel = fout.getChannel(); byteBuffer.flip(); fileChannel.write(byteBuffer); } } public static void main(String... args) throws IOException { writeContentToFile("Hello, How are you", FILE_PATH); } }
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