Java ListResourceBundle handleGetObject(String key) Method

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Description

The Java ListResourceBundle handleGetObject(String key) method method gets an object for the given key from this resource bundle. Returns null if this resource bundle does not contain an object for the given key.

Declaration

Following is the declaration for java.util.ListResourceBundle.handleGetObject(String key) method

public final Object handleGetObject(String key)

Parameters

key − the key for the desired object

Return Value

This method returns the object for the given key, or null.

Exception

NA

Getting Value from ListResourceBundle of String, Integer Pair Example

The following example shows the usage of Java ListResourceBundle handleGetObject() method to get a value from a ListResourceBundle. We've created a ListResourceBundle object having contents an two dimensional array of String, Integer pairs. Then few entries are added by overriding getContents() method and then a value is retrieved using key using handleGetObject() method and is printed.

package com.tutorialspoint;

import java.util.Enumeration;
import java.util.ListResourceBundle;

// create a class that extends to ListResourceBundle
class MyResources extends ListResourceBundle {

   // get contents must be implemented
   protected Object[][] getContents() {
      return new Object[][] {
         {"1", 1},
         {"2", 2},
         {"3", 3}
      };
   }
}

public class ListResourceBundleDemo {
   public static void main(String[] args) {

      // create a new MyResources instance
      MyResources mr = new MyResources();
	  
      // print the value for key 1
      System.out.println("" + mr.handleGetObject("1"));
   }
}

Output

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

1
2
3

Getting Value from ListResourceBundle of String, String Pair Example

The following example shows the usage of Java ListResourceBundle handleGetObject() method to get a value from a ListResourceBundle. We've created a ListResourceBundle object having contents an two dimensional array of String, String pairs. Then few entries are added by overriding getContents() method and then a value is retrieved using key using handleGetObject() method and is printed.

package com.tutorialspoint;

import java.util.Enumeration;
import java.util.ListResourceBundle;

// create a class that extends to ListResourceBundle
class MyResources extends ListResourceBundle {

   // get contents must be implemented
   protected Object[][] getContents() {
      return new Object[][] {
         {"1", "Hello World!"},
         {"2", "Goodbye World!"},
         {"3", "Goodnight World!"}
      };
   }
}

public class ListResourceBundleDemo {
   public static void main(String[] args) {

      // create a new MyResources instance
      MyResources mr = new MyResources();
	  
      // print the value for key 1
      System.out.println("" + mr.handleGetObject("1"));
   }
}

Output

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

Hello World!

Getting Value from ListResourceBundle of String, Object Pair Example

The following example shows the usage of Java ListResourceBundle handleGetObject() method to get a value from a ListResourceBundle. We've created a ListResourceBundle object having contents an two dimensional array of String, Student pairs. Then few entries are added by overriding getContents() method and then a value is retrieved using key using handleGetObject() method and is printed.

package com.tutorialspoint;

import java.util.Enumeration;
import java.util.ListResourceBundle;

// create a class that extends to ListResourceBundle
class MyResources extends ListResourceBundle {

   // get contents must be implemented
   protected Object[][] getContents() {
      return new Object[][] {
         {"1", new Student(1, "Julie")},
         {"2", new Student(2, "Robert")},
         {"3", new Student(3, "Adam")}
      };
   }
}

public class ListResourceBundleDemo {
   public static void main(String[] args) {

      // create a new MyResources instance
      MyResources mr = new MyResources();
	  
      // print the value for key 1
      System.out.println("" + mr.handleGetObject("1"));
   }
}
class Student {
   int rollNo;
   String name;

   Student(int rollNo, String name){
      this.rollNo = rollNo;
      this.name = name;
   }

   @Override
   public String toString() {
      return "[ " + this.rollNo + ", " + this.name + " ]";
   }
}

Output

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

[ 1, Julie ]