有人能告诉我我的错误for loop吗?我花了很多时间试错,并在互联网上进行研究,但我仍然无法找到解决方案.它继续说预期的标识符找不到符号.请帮忙谢谢!
package imageviewer;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Scanner;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class ImageViewer extends JPanel implements ActionListener {
JPanel bottomPanel;
JLabel imageLabel;
JButton previousBtn;
JButton nxtBtn;
ImageViewer()
{
imageLabel = new JLabel("Image Display");
imageLabel.setBackground(Color.WHITE);
imageLabel.setOpaque(true);
add(imageLabel);
previousBtn = new JButton("Previous");
previousBtn.addActionListener(this);
add(previousBtn);
nxtBtn = new JButton("Next");
nxtBtn.addActionListener(this);
add(nxtBtn);
}
String userInput = JOptionPane.showInputDialog("Please input name of first image file");
Scanner myScanner = new Scanner(userInput); …Run Code Online (Sandbox Code Playgroud) 我的部分应用程序遇到了这个问题.该String行变量包含12.2安德鲁和我想单独割裂开来,但它不工作,并带有一个NumberFormatException错误.你能帮帮我吗?
String line = "12.2 Andrew";
String[] data = line.split("(?<=\\d)(?=[a-zA-Z])");
System.out.println(Double.valueOf.(data[0]));
Run Code Online (Sandbox Code Playgroud) 我正在做一个过去的学校工作,它是关于微波应用程序与儿童班,时钟.不知怎的,有些人,我对我的代码感到困惑,完全迷失了.有人可以帮我这些吗?谢谢!

首先是Clock类.
class Clock extends Microwave {
private int hour;
private int minute;
private int second;
Clock()
{
hour = 0;
minute = 0;
second = 0;
}
Clock(int h, int m, int s)
{
hour = h;
minute = m;
second = s;
}
public int getHour()
{
return hour;
}
public int getMin()
{
return minute;
}
public int getSec()
{
return second;
}
public String toString()
{
return (String.valueOf(second));
}
protected void tick()
{
second++;
if(hour == …Run Code Online (Sandbox Code Playgroud)