Demo :: Extract Method

1.java

class A {
	
	public void resetSession() {
		Foo.start();
		Foo.open();
		Foo.maximizeWindow();
	}

}

2.java

class A {
	
	public void resetSession() {
		Foo.start();
		openAndMaximize();
	}

	private void openAndMaximize() {
		Foo.open();
		Foo.maximizeWindow();
	}

}

3.java

public void printData() {
	printBanner();

	//Print Details
	System.out.println("Detail 1");
	System.out.println("Detail 2");
}

4.java

public void printData() {
	printBanner();
	printDetails();
}

private void printDetails() {
	System.out.println("Detail 1");
	System.out.println("Detail 2");
}

5.java

public void printData() {

	List<Order> orders = getOrders();
	double result = 0.0;

	printBanner();

	//calculate result
	for(Order order : orders) {
		result += order.getAmount();
	}

	printDetails(result);
}

6.java

public void printData() {
	printBanner();
	double result = getResult();
	printDetails(result);
}

private double getResult() {
	List<Order> orders = getOrders();
	double result = 0.0;

	for(Order order : orders) {
		result += order.getAmount();
	}
	return result;
}