策略模式

//技能接口
public interface IAttackBehavior  {  
    void attack();  
}  

public interface IDefendBehavior  {  
    void defend();  
}  

public interface IDisplayBehavior  {  
    void display();  
} 

//技能实现类 如果技能一样可以抽出来,不然可以用匿名
public class AttackJY implements IAttackBehavior  {  
  
    @Override  
    public void attack()  
    {  
        System.out.println("九阳神功！");  
    }  
  
}  

public class DefendTBS implements IDefendBehavior  {  
  
    @Override  
    public void defend()  
    {  
        System.out.println("铁布衫");  
    }  
  
} 

public class RunJCTQ implements IRunBehavior  {  
  
    @Override  
    public void run()  
    {  
        System.out.println("金蝉脱壳");  
    }  
  
}  

//抽象角色类
public abstract class Role  {  
    protected String name;  
  
    protected IDefendBehavior defendBehavior;  
    protected IDisplayBehavior displayBehavior;  
    protected IRunBehavior runBehavior;  
    protected IAttackBehavior attackBehavior;  
  
    public Role setDefendBehavior(IDefendBehavior defendBehavior){  
        this.defendBehavior = defendBehavior;  
        return this;  
    }  
  
    public Role setDisplayBehavior(IDisplayBehavior displayBehavior){  
        this.displayBehavior = displayBehavior;  
        return this;  
    }  
  
    public Role setRunBehavior(IRunBehavior runBehavior){  
        this.runBehavior = runBehavior;  
        return this;  
    }  
  
    public Role setAttackBehavior(IAttackBehavior attackBehavior){  
        this.attackBehavior = attackBehavior;  
        return this;  
    }  
  
    protected void display()     {  
        displayBehavior.display();  
    }  
  
    protected void run()      {  
        runBehavior.run();  
    }  
  
    protected void attack()      {  
        attackBehavior.attack();  
    }  
  
    protected void defend()      {  
        defendBehavior.defend();  
    }  
  
}  

//角色实现

public class RoleA extends Role  {  
    public RoleA(String name)  
    {  
        this.name = name;  
    }  
  
} 

public class Test  {  
    public static void main(String[] args)  
    {  
  
        Role roleA = new RoleA("A");  
  
        roleA.setAttackBehavior(new AttackXL())//  
                .setDefendBehavior(new DefendTBS())//  
                .setDisplayBehavior(new DisplayA())//  
                .setRunBehavior(new RunJCTQ());  
        System.out.println(roleA.name + ":");  
        roleA.run();  
        roleA.attack();  
        roleA.defend();  
        roleA.display();  
    }  
}  

image