Singleton Template For Eclipse

Singleton design pattern is one of the mostly used design pattern. This tutorial helps you to add a template in Eclipse to easily create Singleton Java classes.

Step 1:

Go to the Windows → Preferences

Step 2:

Expand the Java → Editor → Templates as shown below.

Step 3:

Click on the “New...” button.

Step 4:

In the appeared dialog, provide the following details.

Name: singleton

Description: Singleton design pattern

Pattern:

/**
 * static Singleton instance.
 */
private static volatile ${enclosing_type} instance;

/**
 * Private constructor for singleton.
 */
private ${enclosing_type}() {
}

/**
 * Return a singleton instance of ${enclosing_type}.
 */
public static ${enclosing_type} getInstance() {
    // Double lock for thread safety.
    if (instance == null) {
        synchronized(${enclosing_type}.class){
            if (instance == null) {
                instance = new ${enclosing_type}();
            }
        }
    }
    return instance;
}

Step 5:

Apply the changes and open any Java class to which you want to apply the singleton design pattern.

Step 6:

Type singleton and press Ctrl + Space.

Step 7:

Select the template by pressing enter or double clicking on it.

I hope it helps you to save your time in creating singleton classes. If you have any problems, feel free to comment below.

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