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Create DataOutputStream from BufferedOutputStream

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; public class MainClass {   public static void main(String[] args) throws IOException {     DataOutputStream out2 = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(         "Data.txt")));     out2.writeDouble(3.14159);     out2.writeUTF("Square root of 2");     out2.close();     DataInputStream in5 = new DataInputStream(new BufferedInputStream(new FileInputStream(         "Data.txt")));     System.out.println(in5.readDouble());     System.out.println(in5.readUTF());   } }