java-组合模式_Composite_

(Composite)

1. (Composite) : -

2.

Composite

3.

4.

1) Composite

2) Component Leaf

5. ( Composite )

1)

package https://www.360docs.net/doc/9014360806.html,posite;

public interface Component

{

public void doSomething();

}

2)

package https://www.360docs.net/doc/9014360806.html,posite;

public class Leaf implements Component

{

@Override

public void doSomething()

{

System.out.println(" ");

}

}

3)

package https://www.360docs.net/doc/9014360806.html,posite;

import java.util.ArrayList;

import java.util.List;

public class Composite implements Component

{

private List list = new

ArrayList();

public void add(Component component)

{

list.add(component);

}

public void remove(Component component)

{

list.remove(component);

}

public List getAll()

{

return this.list;

}

@Override

public void doSomething()

{

for(Component component : list)

{

component.doSomething();

}

}

}

4)

package https://www.360docs.net/doc/9014360806.html,posite;

public class Client

{

public static void main(String[] args) {

Component leaf1 = new Leaf();

Component leaf2 = new Leaf();

Composite comp1 = new Composite();

comp1.add(leaf1);

comp1.add(leaf2);

Component leaf3 = new Leaf();

Component leaf4 = new Leaf();

Composite comp2 = new Composite();

comp2.add(comp1);

comp2.add(leaf3);

comp2.add(leaf4);

comp2.doSomething();

}

}

6. junit suite

7. (

Component )

1)Component

package https://www.360docs.net/doc/9014360806.html,posite2;

import java.util.List;

public interface Component

{

public void doSomething();

public void add(Component component);

public void remove(Component component);

public List getAll();

}

2)Composite

package https://www.360docs.net/doc/9014360806.html,posite2;

import java.util.ArrayList;

import java.util.List;

public class Composite implements Component

{

List list = new ArrayList();

@Override

public void doSomething()

{

for(Component component : list)

{

component.doSomething();

}

}

@Override

public void add(Component component)

{

list.add(component);

}

@Override

public void remove(Component component)

{

list.remove(component);

}

@Override

public List getAll()

{

return this.list;

}

}

3)Leaf

package https://www.360docs.net/doc/9014360806.html,posite2;

import java.util.List;

public class Leaf implements Component

{

@Override

public void doSomething()

{

System.out.println(" ");

}

@Override

public void add(Component component){}

@Override

public void remove(Component component){}

@Override

public List getAll()

{

return null;

}

}

4)

8.