Question

所以我有一个接口，它由一个名为Vehicle的类实现，它接受一个double值作为参数：

public class Vehicle implements Efficiency
{
  //instance variable
  private double efficiency;

  public Vehicle(double x)
  {
  //parameter initializes the instance variable 
  x = efficiency; 
}

这是界面：

public interface Efficiency 
{
  double getEfficiency(); 
}

我需要创建一个名为getFirstBelowT（）的方法，它接受一个效率数组和一个double作为参数。该方法应该返回一个Efficiency对象，该对象是数组中第一个小于参数中double值的对象。如何将效率数组中的元素与double值进行比较？这就是我到目前为止所做的：

//a method that returns an Efficiency object that is the first
//object in the array with a efficiency below the double parameter

public static Efficiency getFirstBelowT(Efficiency[] x, double y)
{ 
    //loop through each value in the array
    for(Efficiency z: x)
    {
        //if the value at the index is less than the double
        if(z < y)
        {   //returns the first value that is less than y and stops looping
            // through the array.
            return z; 
            break; 
        }
    }
    //returns null if none of the element values are less than the double                
    return null;
}

Answer 1

你基本上就在那里：

您需要在条件中调用if(z.getEfficiency() < y)方法：
```
break
```
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包含接口对象作为参数的数组的Java方法

1 个答案: