java - 创建一个 ArrayList，其中包含用户定义的最小值和最大值之间的一组数字（JAVA）

Question

基本上，我需要创建一个名为：

public boolean doesContain(double x)

像这样工作：

Returns true if and only if x lies between left and right, and the
interval is not empty (i.e. left < right).

这就是类的样子：

public class Interval {

    private double left;
    private double right;

    public Interval(double left, double right){
        this.left = left;
        this.right = right;
    }

    public boolean doesContain(double x){

        ArrayList<Double> nums = new ArrayList<Double>();
        //Add code here

    }
}

Answer 1

public boolean doesContain(double x){
    return left < right && left <= x && x <= right;
}

Answer 2

public boolean doesContain(double x) {
    if (left >= right) {
        return false;
    } else {
        return x >= left && x <= right;
    }
}