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What are the examples of Builder design pattern in JDK?

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Pragya Keshap answered on February 10, 2023 Popularity 3/10 Helpfulness 1/10

answer What are the examples of Builder design pattern in JDK?

What are the examples of Builder design pattern in JDK?

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In JDK there are many places where Builder design pattern is used.

Some of these are as follows:

1. java.lang.StringBuilder.append(): StringBuilder is based

on Builder pattern.

2. java.nio.IntBuffer.put(): Invocation of put() method return

IntBuffer. Also there are many variants of this method to

build the IntBuffer.

3. javax.swing.GroupLayout.Group.addComponent(): We can

use addComponent() method to build a UI that can contain

multiple levels of components.

4. java.lang.Appendable

5. java.lang.StringBuffer.append(): StringBuffer is similar to

StringBuilder and it is also based on Builder design

pattern.

public class Computer {
	
	//required parameters
	private String HDD;
	private String RAM;
	
	//optional parameters
	private boolean isGraphicsCardEnabled;
	private boolean isBluetoothEnabled;
	

	public String getHDD() {
		return HDD;
	}

	public String getRAM() {
		return RAM;
	}

	public boolean isGraphicsCardEnabled() {
		return isGraphicsCardEnabled;
	}

	public boolean isBluetoothEnabled() {
		return isBluetoothEnabled;
	}
	
	private Computer(ComputerBuilder builder) {
		this.HDD=builder.HDD;
		this.RAM=builder.RAM;
		this.isGraphicsCardEnabled=builder.isGraphicsCardEnabled;
		this.isBluetoothEnabled=builder.isBluetoothEnabled;
	}
	
	//Builder Class
	public static class ComputerBuilder{

		// required parameters
		private String HDD;
		private String RAM;

		// optional parameters
		private boolean isGraphicsCardEnabled;
		private boolean isBluetoothEnabled;
		
		public ComputerBuilder(String hdd, String ram){
			this.HDD=hdd;
			this.RAM=ram;
		}

		public ComputerBuilder setGraphicsCardEnabled(boolean isGraphicsCardEnabled) {
			this.isGraphicsCardEnabled = isGraphicsCardEnabled;
			return this;
		}

		public ComputerBuilder setBluetoothEnabled(boolean isBluetoothEnabled) {
			this.isBluetoothEnabled = isBluetoothEnabled;
			return this;
		}
		
		public Computer build(){
			return new Computer(this);
		}

	}

}

https://www.digitalocean.com/community/tutorials/builder-design-pattern-in-java

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: builder java

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Contributed on Feb 10 2023

Pragya Keshap

0 Answers Avg Quality 2/10

What are the examples of Builder design pattern in JDK?

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