Command Pattern - serial running

Command Pattern - serial running - modified

Java

by techbard 2016. 7. 21. 14:58

# ICalc.java

public interface ICalc {
void calc(Data data);
}

# Data.java

public class Data {
private int x, y = 0;

public Data(int x, int y) {
this.x = x;
this.y = y;
}

public int getX() {
return x;
}

public int getY() {
return y;
}
}

# Plus.java

public class Plus implements ICalc {

@Override
public void calc(Data data) {
int x = data.getX();
int y = data.getY();

System.out.println("plus: " + (x + y));
}
}

# Minus.java

public class Minus implements ICalc {

@Override
public void calc(Data data) {
int x = data.getX();
int y = data.getY();

System.out.println("minus: " + (x - y));
}
}

# Multiply.java

public class Multiply implements ICalc {

@Override
public void calc(Data data) {
int x = data.getX();
int y = data.getY();

System.out.println("multiply: " + (x * y));
}
}

# CalcManager.java

import java.util.ArrayList;

public class CalcManager {
private ArrayList<ICalc> calcs = new ArrayList<>();

public void execute(Data data) {
System.out.println("x: " + data.getX());
System.out.println("y: " + data.getY());
System.out.println("==========");

for (ICalc calc : calcs) {
calc.calc(data);
}
}

public void add(ICalc calc) {
if (!calcs.contains(calc)) {
calcs.add(calc);
}
}
}

# Main.java

public class Main {
public static void main(String[] args) {
Data data = new Data(3, 4);

CalcManager cm = new CalcManager();
cm.add(new Plus());
cm.add(new Minus());
cm.add(new Multiply());

cm.execute(data);
}
}