类适配器

1、Client.java

public class client { public static void main(String[] args) { System.out.println("===类适配器==="); Phone phone = new Phone(); phone.charging(new VoltageAdapter()); } }

2、Phone.java

public class Phone { // 充电 public void charging(Voltage5V voltage5V){ if(voltage5V.Output5V() == 5){ System.out.println("电压为5V，可以充电"); }else if(voltage5V.Output5V() > 5){ System.out.println("电压大5V，不能充电~~"); } } }

3、Voltage5V.java

// 被适配的接口 public interface Voltage5V { public int Output5V(); }

4、VoltageAdapter.java

public class VoltageAdapter extends Voltage220V implements Voltage5V{ @Override public int Output5V() { // 获取到220V电压 int srcV = output220V(); int dstV = srcV /44; // 转为5V return dstV; } }

5、Voltage220V.java

// 被适配的类 public class Voltage220V { // 输出220V电压 public int output220V() { int src = 220; System.out.println("电压 = " + src + "伏"); return src; } }