How to Open only one JFrame form instance at a time in JAVA using NetBeansIDE

Опубликовано: 25 Май 2013
на канале: raksrahul

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How to Open only one JFrame form instance at a time in JAVA using NetBeansIDE

Suppose I want to open JFrame2 after clicking on JFrame1 JButton

1. Open NetBeansIDE

2. Create a JFrame1 and JFrame2 forms in a project

3. Create a JButton in JFrame1

4. Add this Code for JButton ActionPerformed:

JFrame2.getObj().setVisible(true);

5. Add this code in JFrame2 class:

private static JFrame2 obj=null;

6. Change the default constructor access modifier to private

7. Make a public static method and write code below in it:

public static JFrame2 getObj(){
if(obj==null){
obj=new JFrame2();
}return obj;
}

8. Run the JFrame1 class

9. only one instance of form will be displayed at a time.

this is also called Singleton Design Pattern

10. Finish

Thank You

#java #NetBeansIDE #programming #coding