类别：
Structual Pattern
问题：
方案：
示例：
import java.util.ArrayList;
import java.util.List;
public class CompositePatternDemo {
public static void main(String[] args) {
Body sun = new Body("太阳", "恒星", 1392000000);
Body mercury = new Body("水星", "行星", 4878000 );
Body venus = new Body("金星", "行星", 12103600 );
Body earth = new Body("地球", "行星", 12756300);
Body moon = new Body("月球", "卫星", 3476280);
Body mars = new Body("火星", "行星", 6794000);
Body jupiter = new Body("木星", "行星", 142984000);
Body saturn = new Body("土星", "行星", 120536000);
Body saturnMoon1 = new Body("土卫一", "行星", 392000);
Body saturnMoon2 = new Body("土卫二", "行星", 500000);
Body uranus = new Body("天王星", "行星", 51120000);
Body neptune = new Body("海王星", "行星", 49528000);
sun.add(mercury);
sun.add(venus);
sun.add(earth);
sun.add(mars);
sun.add(jupiter);
sun.add(saturn);
sun.add(uranus);
sun.add(neptune);
earth.add(moon);
saturn.add(saturnMoon1);
saturn.add(saturnMoon2);
System.out.println(sun);
for (Body planet : sun.getSubLevelList()) {
System.out.println(planet);
for (Body satellite : planet.getSubLevelList()) {
System.out.println(satellite);
}
}
}
}
class Body {
private String name;
private String level;
private int diameter;
private List<Body> subLevelList;
public Body(String name, String level, int diameter) {
this.name = name;
this.level = level;
this.diameter = diameter;
subLevelList = new ArrayList<Body>();
}
public void add(Body e) {
subLevelList.add(e);
}
public void remove(Body e) {
subLevelList.remove(e);
}
public List<Body> getSubLevelList() {
return subLevelList;
}
@Override
public String toString() {
return "Body [name=" + name + ", level=" + level + ", diameter=" + diameter + "]";
}
}
Body [name=太阳, level=恒星, diameter=1392000000] Body [name=水星, level=行星, diameter=4878000] Body [name=金星, level=行星, diameter=12103600] Body [name=地球, level=行星, diameter=12756300] Body [name=月球, level=卫星, diameter=3476280] Body [name=火星, level=行星, diameter=6794000] Body [name=木星, level=行星, diameter=142984000] Body [name=土星, level=行星, diameter=120536000] Body [name=土卫一, level=行星, diameter=392000] Body [name=土卫二, level=行星, diameter=500000] Body [name=天王星, level=行星, diameter=51120000] Body [name=海王星, level=行星, diameter=49528000]
应用：
不足：(
优化：）
标签：Body,diameter,name,level,Composite,Pattern,add,行星 From： https://www.cnblogs.com/zno2/p/6694831.html