Properties getProperty(key) method in Java with Examples
The getProperty(key) method of Properties class is used to get the value mapped to this key, passed as the parameter, in this Properties object. This method will fetch the corresponding value to this key, if present, and return it. If there is no such mapping, then it returns null.
Syntax:
public Object getProperty(String key)
Parameters: This method accepts a parameter key whose mapping is to be checked in this Properties object.
Returns: This method returns the value fetched corresponding to this key, if present. If there is no such mapping, then it returns null.
Below programs illustrate the getProperty(key) method:
Program 1:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
Properties properties = new Properties();
properties.put( "Pen" , 10 );
properties.put( "Book" , 500 );
properties.put( "Clothes" , 400 );
properties.put( "Mobile" , 5000 );
System.out.println( "Properties: "
+ properties
.toString());
System.out.println( "Value of Pen: "
+ properties
.getProperty( "Pen" ));
System.out.println( "Value of Phone: "
+ properties
.getProperty( "Phone" ));
}
}
|
Output:
Properties: {Book=500, Mobile=5000, Pen=10, Clothes=400}
Value of Pen: null
Value of Phone: null
Program 2:
import java.util.*;
public class GFG {
public static void main(String[] args)
{
Properties properties = new Properties();
properties.put( 1 , "100RS" );
properties.put( 2 , "500RS" );
properties.put( 3 , "1000RS" );
System.out.println( "Current Properties: "
+ properties
.toString());
System.out.println( "Value of 1: "
+ properties
.getProperty( "1" ));
System.out.println( "Value of 5: "
+ properties
.getProperty( "5" ));
}
}
|
Output:
Current Properties: {3=1000RS, 2=500RS, 1=100RS}
Value of 1: null
Value of 5: null
References: https://docs.oracle.com/javase/9/docs/api/java/util/Properties.html#getProperty-java.lang.String-
Last Updated :
23 May, 2019
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