设计模式（解释器模式）

public class Context {
    private String value;
    
    public Context(){
        this.value = "Init";
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}

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

public class OneExpression implements Expression {

    @Override
    public void interpret(Context context) {
        System.out.println("OneExpression interpret  " + context.getValue());
    }
}

public class App {

    public static void main(String[] args) {
        Context context = new Context();
        OneExpression expression = new OneExpression();
        expression.interpret(context);    
    }
}