Question

令人沮丧的格式错误的网址异常。作为测试，我添加了“网址网址=新网址（”http://www.google.com“）; ”只是为了查看一个非常简单的网址是否会引发错误，而且确实如此。我迷失了造成这种情况的原因。

import javax.swing.*;
import java.net.*;

public class Train {

public static void main(String[] args) {
    URL url = new URL("http://www.google.com");
    ImageIcon icon = new ImageIcon(new URL("https://upload.wikimedia.org/wikipedia/commons/d/d4/Wikipedesketch1.png"));**
    Integer miles = Integer.parseInt(JOptionPane.showInputDialog("Enter the miles"));
    Double gallons = Double.parseDouble(JOptionPane.showInputDialog("Enter the gallons"));  
    Double mpg = miles / gallons;
    JOptionPane.showMessageDialog(null, "Miles per gallon is " + mpg, "Gass Mileage", JOptionPane.PLAIN_MESSAGE, icon); 
}

}

线程“main”中的异常java.lang.Error：未解决的编译问题：未处理的异常类型MalformedURLException 未处理的异常类型MalformedURLException

at Train.main(Train.java:13)

Answer 1

你有编译错误，并且没有抛出的异常的try / catch 新的ImageIcon（）

试试这个：

import javax.swing.*;
import java.net.*;
public class Train {
    public static void main(String[] args) {
        try {
        URL url = new URL("http://www.google.com");
        ImageIcon icon = new ImageIcon(new URL("https://upload.wikimedia.org/wikipedia/commons/d/d4/Wikipedesketch1.png"));
        Integer miles = Integer.parseInt(JOptionPane.showInputDialog("Enter the miles"));
        Double gallons = Double.parseDouble(JOptionPane.showInputDialog("Enter the gallons"));  
        Double mpg = miles / gallons;
        JOptionPane.showMessageDialog(null, "Miles per gallon is " + mpg, "Gass Mileage", JOptionPane.PLAIN_MESSAGE, icon);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

简单url的Java格式错误的url异常

1 个答案: