java函数式编程--柯里化（Currying），闭包

public class Closure {
    public  String version=""; 

    public static void main(String[] args) {
        Closure c1=new Closure();
        c1.version="1.0";
        Moment m1=c1.getMoment();
        System.out.println(m1.getVersion());
        
        c1.version="2.0";
        Moment m2=c1.getMoment();
        System.out.println(m2.getVersion());
    }

    public Moment getMoment(){
        return new Moment() {
            
            @Override
            public String getVersion() {
                
                return version;
            }
        };
    }

}

interface Moment{
    String getVersion();
}

public class keli {

    public  calculator changeCalc(final initialize init, final int num) {
        return new calculator() {

            @Override
            public int cal(int addend) {
                return init.init(num) + addend;

            }
        };
    }

    public static void main(String[] args) {
        
        initialize init1 = new initialize() {

            @Override
            public int init(int num) {
                num = num * 10;
                return num;
            }
        };
        
        initialize init2 = new init2();
        
        calculator clac1=new keli().changeCalc(init1,3);
        calculator clac2=new keli().changeCalc(init2,3);
        System.out.println(clac1.cal(2));
        System.out.println(clac2.cal(2));
        
    }
}

class init2 implements initialize{

    @Override
    public int init(int num) {
        num = num / 10;
        return num;
    }    
}

interface calculator {
    int cal(int num);
}

interface initialize {
    int init(int num);
}

public class currying3 implements Proto {
    public List<String> paramList = null;

    public currying3(List<String> paramList) {
        this.paramList = paramList;
    }

    @Override
    public List<String> getList() {
        
        return this.paramList;
    }
    
    public static void main(String[] args) {
        
        List<String> paramList = new ArrayList<String>();
        Proto p = new currying3(paramList);
        p.handle("aa").handle("bb").handle("cc").handle();
        System.out.println("end.....");

        List<String> paramList1 = new ArrayList<String>();
        Proto p1 = new currying3(paramList1);
        p1.handle("dd").handle("ee").handle("ff").handle();
        System.out.println("end.....");
    }
}

interface Proto {
    public List<String> getList();
    
    default Proto handle(String... param) {
        List<String> paramList=this.getList();
        if (param == null || param.length <= 0) {
            for (String Str : paramList) {
                System.out.println(Str);
            }
            return null;
        } else {

            for (String Str : param) {
                paramList.add(Str);
            }

            return this;
        }
    }
}