Builder模式：
父类：
public class Computer {
protected String mBoard;
protected String mDisplay;
protected String mOs;
protected Computer() {
}
}
具体实现类：
public class Macbook extends Computer {
private Macbook(Builder builder) {
this.mOs = builder.mOs;
this.mBoard = builder.mBoard;
this.mDisplay = builder.mDisplay;
}
static class Builder {
protected String mBoard;
protected String mDisplay;
protected String mOs;
public Builder setmOs(String mOs) {
this.mOs = mOs;
return this;
}
public Builder setmBoard(String mBoard) {
this.mBoard = mBoard;
return this;
}
public Builder setmDisplay(String mDisplay) {
this.mDisplay = mDisplay;
return this;
}
public Macbook build() {
return new Macbook(this);
}
}
}
具体调用代码：
Macbook macbook = new Macbook.Builder()
.setmBoard("board")
.setmDisplay("display")
.setmOs("os")
.build();
