java接口编程

来源：百度知道 编辑：UC知道 时间：2024/05/22 04:17:13
编写接口Muitiplication，定义mult方法，参数是两个double类型，编写此接口的两种实现，一种是参数相乘后输出，一种是相连后输出，并编写测试代码对所有方法进行测试。

//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));
}

public interface Muitiplication {

void mult(double a,double b);

}
public class A implements Muitiplication {
void mult(double a,double b) {
System.out.println(a*b);
}