Properties get(key) method in Java with Examples
Last Updated :
30 Sep, 2019
The get(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 get(Object 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 get(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.get( "Pen" ));
System.out.println( "Value of Phone: "
+ properties.get( "Phone" ));
}
}
|
Output:
Properties: {Book=500, Mobile=5000, Pen=10, Clothes=400}
Value of Pen: 10
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.get( 1 ));
System.out.println( "Value of 5: "
+ properties.get( 5 ));
}
}
|
Output:
Current Properties: {3=1000RS, 2=500RS, 1=100RS}
Value of 1: 100RS
Value of 5: null
References: https://docs.oracle.com/javase/9/docs/api/java/util/Properties.html#get-java.lang.Object-
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