0921-----In class to practive-----enlish starts
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1 //client class 2 public class Text1{ 3 //main function 4 public static void main(String args[]){ 5 Robot r1=new Robot(){ 6 public void run(){ 7 System.out.println("I can running too."); 8 } 9 public void jump(){ 10 System.out.println("I can jumpping too."); 11 } 12 }; 13 r1.run(); 14 r1.jump(); 15 Robot r2=new T200(); 16 r2.jump(); 17 r2.run(); 18 r2.listen(); 19 20 //comments implements 21 // Runnable implements one 22 Runnable r11=new Runnable(){ 23 public void run(){ 24 System.out.println("I am java 7!"); 25 } 26 }; 27 r11.run(); 28 29 //java 8 implements 30 // Runnable implements two 31 Runnable r22=()->System.out.println("I am java 8!"); 32 r22.run(); 33 34 //java 8 implements 35 ICpu cpu=(String str)->System.out.println(str); 36 cpu.start("Cpu is starting working!"); 37 } 38 } 39 //Robot class 40 //if the class has an abstract function , then the class must be an abstract class 41 //the abstract class must not be hasing an abstract function 42 abstract class Robot{ 43 //listenning 44 public void listen(){ 45 System.out.println("I can listenning."); 46 } 47 //speaking 48 public void speak(){ 49 System.out.println("I can speaking."); 50 } 51 //running 52 //abstract function 53 public abstract void run(); 54 //jumpping 55 //abstract function 56 public abstract void jump(); 57 } 58 //T100 extends Robot 59 abstract class T100 extends Robot{ 60 public void run(){ 61 System.out.println("I can running."); 62 } 63 public abstract void jump(); 64 } 65 //T200 extends Robot 66 class T200 extends T100{ 67 public void jump(){ 68 System.out.println("I can jumpping."); 69 } 70 } 71 //interface example 72 interface ICpu{ 73 //const only 74 //abstract function only 75 //the default modifier is public and abstract 76 double PI=3.1415927; 77 void start(String str); 78 }