java回傳java.lang.NumberFormatException異常

Question

代碼如下,其中getX()成功有返回結果,getY()卻報異常.

public class AddressUtilDemo {
    public static void main(String[] args){
        AddressUtil AddressUtil = new AddressUtil();
        AddressUtil.setAddress("3454.234,24l.432");
        System.out.println(AddressUtil.getX());
        System.out.println(AddressUtil.getY());
    }

}
class AddressUtil {
    private String address;
    public AddressUtil(){}
    public AddressUtil(String address){
        if(address.indexOf(",")>0){
            this.address = address;
        }
    }
    public Double getX(){
        String string = address.substring(0, address.indexOf(",")) ;
        return Double.parseDouble(string);
    }
    public Double getY(){
        String string = address.substring((address.indexOf(",")+1));
        return Double.parseDouble(string);
    }

    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address.trim();
    }
}

試過string.trim()等方法都無效.debug看到的string確實是預期中的數值.
以下是異常信息:

Exception in thread "main" java.lang.NumberFormatException: For input string: "24l.432"

Answer 1

你應該學會調試,看看getY中的string就知道問題了

Answer 2

24l.432
24後們是 L，不是 1

Answer 3

騷年，你main函數裡setAddress的是3454.234,24l.432（24L，是L不是1），所以y是錯的，轉換失敗了，建議編輯器字體用Source Code Pro 還能看的出來