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// Java program to demonstrate implementation of 
// Strategy Pattern 

// Abstract as you must have a specific fighter 
abstract class Fighter { 
	KickBehavior kickBehavior; 
	JumpBehavior jumpBehavior; 

	public Fighter(KickBehavior kickBehavior, 
				JumpBehavior jumpBehavior) { 
		this.jumpBehavior = jumpBehavior; 
		this.kickBehavior = kickBehavior; 
	}
	
	public void punch() { 
		System.out.println("Default Punch"); 
	} 
	
	public void kick() { 
		// delegate to kick behavior 
		kickBehavior.kick(); 
	} 
	
	public void jump() { 

		// delegate to jump behavior 
		jumpBehavior.jump(); 
	} 
	
	public void roll() { 
		System.out.println("Default Roll"); 
	} 
	
	public void setKickBehavior(KickBehavior kickBehavior) 	{ 
		this.kickBehavior = kickBehavior; 
	} 
	
	public void setJumpBehavior(JumpBehavior jumpBehavior) 	{ 
		this.jumpBehavior = jumpBehavior; 
	} 
	
	public abstract void display(); 
	
} 

// Encapsulated kick behaviors 
interface KickBehavior 
{ 
	public void kick(); 
} 
class LightningKick implements KickBehavior 
{ 
	public void kick() 
	{ 
		System.out.println("Lightning Kick"); 
	} 
} 
class TornadoKick implements KickBehavior 
{ 
	public void kick() 
	{ 
		System.out.println("Tornado Kick"); 
	} 
} 

// Encapsulated jump behaviors 
interface JumpBehavior 
{ 
	public void jump(); 
} 
class ShortJump implements JumpBehavior 
{ 
	public void jump() 
	{ 
		System.out.println("Short Jump"); 
	} 
} 
class LongJump implements JumpBehavior 
{ 
	public void jump() 
	{ 
		System.out.println("Long Jump"); 
	} 
} 

class Ken extends Fighter 
{ 
	public Ken(KickBehavior kickBehavior, 
			JumpBehavior jumpBehavior) 
	{ 
		super(kickBehavior,jumpBehavior); 
	} 
	public void display() 
	{ 
		System.out.println("Ken"); 
	} 
} 

// Characters 
class Ryu extends Fighter 
{ 
	public Ryu(KickBehavior kickBehavior, 
			JumpBehavior jumpBehavior) 
	{ 
		super(kickBehavior,jumpBehavior); 
	} 
	public void display() 
	{ 
		System.out.println("Ryu"); 
	} 
} 

class ChunLi extends Fighter 
{ 
	public ChunLi(KickBehavior kickBehavior, 
				JumpBehavior jumpBehavior) 
	{ 
		super(kickBehavior,jumpBehavior); 
	} 
	public void display() 
	{ 
		System.out.println("ChunLi"); 
	} 
} 

// Driver class 
class StreetFighter 
{ 
	public static void main(String args[]) 
	{ 
		// let us make some behaviors first 
		JumpBehavior shortJump = new ShortJump(); 
		JumpBehavior LongJump = new LongJump(); 
		KickBehavior tornadoKick = new TornadoKick(); 

		// Make a fighter with desired behaviors 
		Fighter ken = new Ken(tornadoKick,shortJump); 
		ken.display(); 

		// Test behaviors 
		ken.punch(); 
		ken.kick(); 
		ken.jump(); 

		// Change behavior dynamically (algorithms are 
		// interchangeable) 
		ken.setJumpBehavior(LongJump); 
		ken.jump(); 
	} 
}