代码重构之提取方法

/**
 * 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);
    }

}