Java internal classes and closures

Internal classes (inner class)

public class Outer{    private String name;    class Inner{        public String getOuterName(){            return Outer.this.name;        }        public void setOuterName(String name){            Outer.this.name = name;        }    }    public static void main(String[] args){        Outer outer = new Outer();        Outer.Inner inner = outer.new Inner();        inner.setOuterName("wangtengfei");        System.out.println(inner.getOuterName());    }}

Local inner class

public class outer{private String name;    Private String sexual = "male";        Class inner1{public String getoutername () {return Outer.this.name;        } public void Setoutername (String name) {Outer.this.name = name; }} public void UpdateName (final String name,final string sexual) {class inner2{public void Chan                Geouterinfo () {Outer.this.name = name;            Outer.this.sexual = sexual;        }} Inner2 Inner2 = new Inner2 ();    Inner2.changeouterinfo ();    } public String getsexual () {return sexual;        } public static void Main (string[] args) {Outer Outer = new Outer ();        Outer.inner1 inner = outer.new Inner1 ();        Inner.setoutername ("Wangtengfei");        System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +outer.getsexual ());        Outer.updatename ("Iris", "female"); System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +oUter.getsexual ()); }}

Static Inner class

public class outer{private String name;    Private String sexual = "male";    public static int count;    Public Outer () {count++;        } class inner1{public String getoutername () {return Outer.this.name;        } public void Setoutername (String name) {Outer.this.name = name; }} public void UpdateName (final String name,final string sexual) {class inner2{public void Chan                Geouterinfo () {Outer.this.name = name;            Outer.this.sexual = sexual;        }} Inner2 Inner2 = new Inner2 ();    Inner2.changeouterinfo ();    } public String getsexual () {return sexual; public static class Inner3{public String Getouterinstancecount () {return "there is" +outer.count+        "Outer instances has been created";        }} public static void Main (string[] args) {Outer Outer = new Outer (); Outer.inner1 inner = outer.new Inner1 ();        Inner.setoutername ("Wangtengfei");        System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +outer.getsexual ());        Outer.updatename ("Iris", "female");        System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +outer.getsexual ());        Inner3 Inner3 = new Inner3 ();    System.out.println (Inner3.getouterinstancecount ()); }}

Anonymous inner class

public class outer{private String name;    Private String sexual = "male";    public static int count;    Public Outer () {count++;        } class inner1{public String getoutername () {return Outer.this.name;        } public void Setoutername (String name) {Outer.this.name = name; }} public void UpdateName (final String name,final string sexual) {class inner2{public void Chan                Geouterinfo () {Outer.this.name = name;            Outer.this.sexual = sexual;        }} Inner2 Inner2 = new Inner2 ();    Inner2.changeouterinfo ();    } public String getsexual () {return sexual; public static class Inner3{public String Getouterinstancecount () {return "there is" +outer.count+        "Outer instances has been created";                }} public void ShowTime () {Thread t = new Thread (new Runnable () {public void run () { Int Time = 60;                int i = 0;                    while (i< time) {System.out.println (Thread.CurrentThread (). toString ());                    System.out.println ((New Date (System.currenttimemillis ())). ToString ());                    i+=5;                    try {thread.sleep (5*1000);                    } catch (Interruptedexception e) {e.printstacktrace ();        }                }            }        });        Executorservice Executorservice = Executors.newcachedthreadpool ();        Executorservice.execute (t);    Executorservice.execute (t);        } public static void Main (string[] args) {Outer Outer = new Outer ();        Outer.inner1 inner = outer.new Inner1 ();        Inner.setoutername ("Wangtengfei");        System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +outer.getsexual ());        Outer.updatename ("Iris", "female"); System.out.println ("Name:" +inner.getoutername () + ", Sexual:"+outer.getsexual ());        Inner3 Inner3 = new Inner3 ();        System.out.println (Inner3.getouterinstancecount ());        Outer.showtime ();    System.out.println ("main process end!"); }}

Callbacks (callbacks) and closures (closure)

A common concept in functional programming, where a member or method in the outer scope that defines it is called inside the scope. example, calling the ShowTime () method of the external Outer class in the Changeouterinfo () method of the local inner class Inner2 (), notice the Invocation method (Outer.this.showTime ())

public class outer{private String name;    Private String sexual = "male";    public static int count;    Public Outer () {count++;        } class inner1{public String getoutername () {return Outer.this.name;        } public void Setoutername (String name) {Outer.this.name = name; }} public void UpdateName (final String name,final string sexual) {class inner2{public void Chan                Geouterinfo () {Outer.this.name = name;                Outer.this.sexual = sexual;            Outer.this.showTime ();        }} Inner2 Inner2 = new Inner2 ();    Inner2.changeouterinfo ();    } public String getsexual () {return sexual; public static class Inner3{public String Getouterinstancecount () {return "there is" +outer.count+        "Outer instances has been created";            }} public void ShowTime () {Thread t = new Thread (new Runnable () {public void Run () {int time = 60;                int i = 0;                    while (i< time) {System.out.println (Thread.CurrentThread (). toString ());                    System.out.println ((New Date (System.currenttimemillis ())). ToString ());                    i+=5;                    try {thread.sleep (5*1000);                    } catch (Interruptedexception e) {e.printstacktrace ();        }                }            }        });        Executorservice Executorservice = Executors.newcachedthreadpool ();        Executorservice.execute (t);    Executorservice.execute (t);        } public static void Main (string[] args) {Outer Outer = new Outer ();        Outer.inner1 inner = outer.new Inner1 ();        Inner.setoutername ("Wangtengfei");        System.out.println ("Name:" +inner.getoutername () + ", Sexual:" +outer.getsexual ());        Outer.updatename ("Iris", "female"); System.out.println ("Name: "+inner.getoutername () +", Sexual: "+outer.getsexual ());        Inner3 Inner3 = new Inner3 ();        System.out.println (Inner3.getouterinstancecount ());//Outer.showtime ();    System.out.println ("main process end!"); }}

Java internal classes and closures