世界上并没有完美的程序，但是我们并不因此而沮丧，因为写程序就是一个不断追求完美的过程。
- 意图
对象的组合再组合 - 类图
- 实例
static class DependentObj1 {
private String data;
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
static class DependentObj2 {
private String data;
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
/**
* 粗粒度实体
*/
static class CoarseGrainedEntity {
private DependentObj1 dependentObj1 = new DependentObj1();
private DependentObj2 dependentObj2 = new DependentObj2();
public void setData (String data1, String data2) {
dependentObj1.setData(data1);
dependentObj2.setData(data2);
}
public String[] getData () {
return new String[]{dependentObj1.getData(), dependentObj2.getData()};
}
}
static class CompositeEntity {
private CoarseGrainedEntity coarseGrainedEntity = new CoarseGrainedEntity();
public void setData (String data1, String data2) {
coarseGrainedEntity.setData(data1, data2);
}
public String[] getData () {
return coarseGrainedEntity.getData();
}
}
static class Client {
private CompositeEntity compositeEntity = new CompositeEntity();
public void setData (String data1, String data2) {
compositeEntity.setData(data1, data2);
}
public void printData () {
int len = compositeEntity.getData().length;
if (len > 0) {
for (int i = 0; i < len; i++) {
System.out.println(compositeEntity.getData()[i]);
}
}
}
}
- 测试
public static void main(String[] args) {
Client client = new Client();
client.setData("hello", "good");
client.printData();
System.out.println();
client.setData("mm", "dd");
client.printData();
}
运行结果：
hello
good
mm
dd
