题解 | #类型转换#

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double d = scanner.nextDouble();
        System.out.println(Main.typeConversion(d));
    }
    public static int typeConversion(double d) {
//用自动装箱与拆箱概念
        Double doubleClass = d;
/*public int intValue()  调用API中Double类的方法
返回此的值 Double作为 int的基本收缩转换之后。*/
        int result = doubleClass.intValue();
        return result;
    }
}