Java.util.Properties.load() Method


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Description

The java.util.Properties.load(InputStream inStream) method reads a property list (key and element pairs) from the input byte stream. The input stream is in a simple line-oriented format as specified in load(Reader) and is assumed to use the ISO 8859-1 character encoding; that is each byte is one Latin1 character.

Declaration

Following is the declaration for java.util.Properties.load() method

public void load(InputStream inStream)

Parameters

  • inStream -- the input stream.

Return Value

This method does not return a value.

Exception

  • IOException -- if an error occurred when reading from the input stream.

  • IllegalArgumentException -- if the input stream contains a malformed Unicode escape sequence.

Example

The following example shows the usage of java.util.Properties.list() method.

package com.tutorialspoint;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.*;

public class PropertiesDemo {

   public static void main(String[] args) {
   Properties prop = new Properties();
   String s = "Height=200";
   String s2 = "Width=15";

   try {

   // create a new input and output stream
   FileOutputStream fos = new FileOutputStream("properties.txt");
   FileInputStream fis = new FileInputStream("properties.txt");

   // write the first property in the output stream file
   fos.write(s.getBytes());

   // change the line between the two properties
   fos.write("\n".getBytes());

   // write next property
   fos.write(s2.getBytes());

   // load from input stream
   prop.load(fis);

   // print the properties list from System.out
   prop.list(System.out);


   } catch (IOException ex) {
   ex.printStackTrace();
   }
   }
}

Let us compile and run the above program, this will produce the following result:

-- listing properties --
Width=15
Height=200

java_util_properties.htm

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