java创建接口编程怎么写代码

interface Bike{

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public void radio();

}

interface Car{

public void tv();

}

interface Dt{

public void music();

}

public class InterfaceDemo implements Bike,Car,Dt{

public void radio() {

System.out.println("可以听广播");

}

public void tv() {

System.out.println("可以看电视");

}

public void music() {

System.out.println("可以听音乐");

}

public static void main(String args[])

{

InterfaceDemo m=new InterfaceDemo();

m.radio();

m.tv();

m.music();

}

}

java如何写一个接口？

非常简单，基础语法：

public interface 接口名 {

常量定义;

抽象方法定义；

default 方法定义；

}

即使你在接口中不定义任何方法，也是可以的。

java接口编程

//Muitiplication接口

public interface Muitiplication{

double mult(double a, double b);

}

//MuitiplicationImpl实现类

public class MuitiplicationImpl implements Muitiplication{

public double mult(double a, double b){

return a * b;

}

}

//MuitiplicationImpls实现类

public class MuitiplicationImpls implements Muitiplication{

public double mult(double a, double b){

return a + b;

}

}

public static void main(args[]){

MuitiplicationImpl m = new MuitiplicationImpl();

System.out.println(m.mult(1.001,1.001));

MuitiplicationImpls ms = new MuitiplicationImpls();

System.out.println(ms.mult(1.001,1.001));

}

求JAVA接口代码

interface l1 { abstract void test(int i); } interface l2 { abstract void test(String s); } public class jiekou implements l1,l2 { public void test(int i) { System.out.println("接口1"); } public void test(String s) { System.out.println("接口2"); } public static void main(String args[]) { jiekou t=new jiekou(); t.test(42); t.test("Hello"); } } 下一个是内部接口 public class groupsix { public interface student_info { public void out(); } public class student implements student_info { int count; String name; public student(String n1) { name=n1; count++; } public void out() { System.out.println(this.name+" count="+this.count); } } public groupsix(String name1[]) { student s1; int i=0; while(iname1.length) { s1=new student(name1[i]); s1.out(); i++; } } public static void main(String args[]) { String arr[]={"A","B","C"}; groupsix g6; new groupsix(arr); } }