Java ObjectInputStream readFloat() Method

The readFloat() method of ObjectInputStream class is used to read a 32-bit float.

Syntax

Parameter

No parameter is passed.

Returns

the 32-bit float read.

Throws

EOFException - If the end of file is reached.

IOException - If other I/O error has occurred.

Example 1

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class ObjectInputStreamreadFloatExample1  {
   public static void main(String[] args) throws IOException {
      
      float[] buf = {1 , 2 , 6 , 6 , 7 , 3};
      
      try {
         // create file output stream
       FileOutputStream   fileoutstream = new FileOutputStream("file1.txt");
         
         // create data output stream
        DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);
         
         // for each byte in the buffer
         for (float b:buf) {
            // write character to the dos
            dataoutstream.writeFloat(b);
         }
         
         // force bytes to the underlying stream
         dataoutstream.flush();
         
         // create file input stream
         InputStream inpstream = new FileInputStream("file1.txt");
         
         // create new data input stream
        DataInputStream datainpstream = new DataInputStream(inpstream);
         
         // read till end of the stream
         while(datainpstream.available()>0) {
         
            // read character
            Float c = datainpstream.readFloat();
            
            // print
            System.out.print("    "+c);
         }
         
      } catch(Exception e) {
            
         e.printStackTrace();
      } 
   }
}

Output:

1.0    2.0    6.0    6.0    7.0    3.0

Example 2

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class ObjectInputStreamreadFloatExample2 {
   public static void main(String[] args) throws IOException {
      
      double[] carray = {21.0, 22.0 , 23.0 , 45.0 , 67.9 , 66.0};
      
      try {
         // create file output stream
       FileOutputStream   fileoutstream = new FileOutputStream("file1.txt");
         
         // create data output stream
        DataOutputStream dataoutstream = new DataOutputStream(fileoutstream);
         
         // for each byte in the buffer
         for (double b:carray) {
            // write character to the dos
            dataoutstream.writeDouble(b);
         }
         
         // force bytes to the underlying stream
         dataoutstream.flush();
         
         // create file input stream
         InputStream inpstream = new FileInputStream("file1.txt");
         
         // create new data input stream
        DataInputStream datainpstream = new DataInputStream(inpstream);
         
         // read till end of the stream
         for(int i=0;i<=carray.length;i++){ 
         
            // read double values in float format
            float c = datainpstream.readFloat();
            
            // print
            System.out.print("    "+c);
         }
         
      } catch(Exception e) {
        
      } 
   }
}

Output:

2.828125    0.0    2.84375    0.0    2.859375    0.0    3.1015625

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