How to Resolve java.lang.NoSuchMethodError for java.nio.ByteBuffer.flip() Method?

What does the java.lang.NoSuchMethodError mean in relation to the java.nio.ByteBuffer.flip() method?

The `java.lang.NoSuchMethodError` indicates that a method which the application expects to exist cannot be found in the environment it is running in. In your case, this error points to the `flip()` method of the `java.nio.ByteBuffer` class.

// Example code demonstrates ByteBuffer usage correctly, assuming no version conflicts:
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.io.IOException;

private String loadFromFile() {
    RandomAccessFile inFile = null;
    FileChannel inChannel = null;
    StringBuilder sb = new StringBuilder();
    try {
        inFile = new RandomAccessFile(this.latestImageFile, "r");
        inChannel = inFile.getChannel();
        ByteBuffer bb = ByteBuffer.allocate(2046);
        while (inChannel.read(bb) != -1) {
            bb.flip();
            while (bb.hasRemaining()) {
                char c = (char) bb.get();
                sb.append(c);
            }
            bb.clear();
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (inChannel != null) try { inChannel.close(); } catch (IOException e) {}
        if (inFile != null) try { inFile.close(); } catch (IOException e) {}
    }
    return sb.toString();
}

Causes

• Mismatch between the JDK versions used in development and runtime.
• Compiling the code with features not available in the current JDK version running the application.
• Dependency conflicts where an older version of a library or JDK is used during execution.

Solutions

• Ensure consistency between the development and runtime Java versions, ideally both should be the same.
• Review your Maven configuration or any other build system configurations to confirm you are using the correct JDK version.
• Check for conflicting versions of libraries included in your project, especially those related to NIO. Use Maven Dependency tree commands to analyze dependencies.

Mistake: Using JDK features that are not present in the runtime environment.

Solution: Make sure the JDK version used to run the application supports the methods utilized in your code.

Mistake: Not aligning the Maven source and target versions with the JDK environment version.

Solution: Use consistent versioning across your development and production environments.