【java設計模式】解譯器模式__java設計模式

步驟一：建立解譯器介面（其中傳入了一個輔助性的參數，所以我們先建立一個輔助類Context,可自選）

public class Context {    private int num1;;    private int num2;public int getNum1() {return num1;}public void setNum1(int num1) {this.num1 = num1;}public int getNum2() {return num2;}public void setNum2(int num2) {this.num2 = num2;}public Context(int num1, int num2) {super();this.num1 = num1;this.num2 = num2;}}

public interface Expression {     public int interpret(Context context);}

步驟二：建立 解譯器具體實作類別

public class Minus implements Expression{public int interpret(Context context) {return context.getNum1()-context.getNum2();}}

步驟三：測試

public class Test {    public static void main(String[] args) {int result= new Minus().interpret(new Context(5, 5));System.out.println("5-5="+result);}}