代码重构之提取方法

- 每个函数的粒度都很小，被复用的机会就更大
- 使高层函数读起来就像一系列注释
- 如果函数是细粒度，覆写也会更容易

/**
 * 提取方法之后
 * Created by luo on 2017/3/4.
 */
public class ExtractMethodBefore {
    private String _name;

    void printOwing(double amount) {
        printBanner();
        // print details
        System.out.println("name:"+_name);
        System.out.println("amount:"+amount);
    }

    private void printBanner() {
    }

}

/**
 * 提取方法之后
 * Created by luo on 2017/3/4.
 */

public class ExtractMethodAfter {
    private String _name;

    void printOwing(double amount){
        printBanner();

        printDetails(amount);
    }

    private void printBanner() {
    }

    public void printDetails(double amount) {
        System.out.println("name:"+_name);
        System.out.println("amount:"+amount);
    }

}