builder pattern added

Author: bunu23

README.md

@@ -23,6 +23,7 @@ public class ConnectionPool {
 private static ConnectionPool pool=new ConnectionPool();
 //this is a pool with only one connection
 private Connection connection=new Connection();
+
 private ConnectionPool() {}
 //add a static method to get an instance of a singleton class
 public static ConnectionPool getPool() {

bin/builder/Application.class

@@ -0,0 +1,24 @@
+package builder;
+
+public class Application {
+
+	public static void main(String[] args) {
+		
+		
+		Customer customer1=new Customer.Builder()
+				.withFirstName("Joe")
+				.withLastName("Doe")
+				.withEmail("joe22@")
+				.withAge(22)
+				.isMarried(false)
+				.withShoeSize(6)
+				.build();
+		System.out.println(customer1);
+		
+		Customer customer2=new Customer.Builder()
+				.withAge(33).isMarried(true).withYearlyAmountSpendOnShoes(44444.0).build();
+		System.out.println(customer2);
+	
+	}
+	
+}

bin/builder/Customer$Builder.class

@@ -0,0 +1,92 @@
+package builder;
+
+public class Customer {
+
+	private String firstName;
+	private String lastName;
+	private String email;
+	private int age;
+	private int shoeSize;
+	private double yearlyIncome;
+	private double yearlyAmountSpendOnShoes;
+	private boolean isMarried;
+	
+	public static class Builder{
+
+		private String firstName="";
+		private String lastName="";
+		private String email="";
+		private int age=0;
+		private int shoeSize=0;
+		private double yearlyIncome=0;
+		private double yearlyAmountSpendOnShoes=0.0;
+		private boolean isMarried=false;
+		
+		public Builder withFirstName(String firstName) {
+			this.firstName=firstName;
+			return this;
+		}
+		
+		public Builder withLastName(String lastName) {
+			this.lastName=lastName;
+			return this;
+		}
+		
+		public Builder withEmail(String email) {
+			this.email=email;
+			return this;
+		}
+		public Builder withAge(int age) {
+			this.age=age;
+			return this;
+			
+		}
+		public Builder withShoeSize(int shoeSize) {
+			this.shoeSize=shoeSize;
+			return this;
+		}
+		public Builder withYearlyIncome(int yearlyIncome) {
+			this.yearlyIncome=yearlyIncome;
+			return this;
+		}
+		public Builder withYearlyAmountSpendOnShoes(double yearlyAmountSpendOnShoes)
+		{
+			this.yearlyAmountSpendOnShoes=yearlyAmountSpendOnShoes;
+			return this;
+		}
+		
+		public Builder isMarried(boolean isMarried){
+			this.isMarried=true;
+			return this;
+		}
+		
+		public Customer build() {
+			return new Customer(this);
+			}
+		
+	}
+
+
+private Customer(Builder builder) {
+	
+	this.firstName=builder.firstName;
+	this.lastName=builder.lastName;
+	this.email=builder.email;
+	this.age=builder.age;
+	this.shoeSize=builder.shoeSize;
+	this.yearlyIncome=builder.yearlyIncome;
+	this.yearlyAmountSpendOnShoes=builder.yearlyAmountSpendOnShoes;
+	this.isMarried=builder.isMarried;
+	
+}
+
+
+@Override
+public String toString() {
+	return "Customer [firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + ", age=" + age
+			+ ", shoeSize=" + shoeSize + ", yearlyIncome=" + yearlyIncome + ", yearlyAmountSpendOnShoes="
+			+ yearlyAmountSpendOnShoes + ", isMarried=" + isMarried + "]";
+}
+
+
+}