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Get FileChannel from FileInputStream

import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.nio.IntBuffer; import java.nio.channels.FileChannel; public class MainClass {   public static void main(String[] args) throws IOException {     FileChannel fc = new FileInputStream(new File("temp.tmp")).getChannel();     IntBuffer ib = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()).asIntBuffer();     while (ib.hasRemaining())       ib.get();     fc.close();   } }