Question

我有点奇怪的情况。

问题在于import java.nio.*;和import java.nio.file.Paths;。

首先，import java.nio.*;无论如何都应该导入第二个类，但我遇到了一些奇怪的事情。这可能是我所犯的一个已知错误，但我是Java的新手。

如果我同时导入两者，或者我只导入java.nio.*，则error: cannot find symbol会获得Files.write(...)。但是，如果我仅导入java.nio.file.Paths，我会收到相同的错误，但Paths.get(...)。

知道为什么会这样吗？我开始探索除这两个类之外的其他选项，我想要做的就是附加一个文本文件。

public static void addAction(String cmd) {
  String text = "Text to save to file";
  Files.write(Paths.get("/Users/Andrew/Desktop/testfile.txt"), text.getBytes());
}

问题出在哪里，但如果我写的其他内容出现问题，我已经附上了以下整个文件：

import java.io.File; // Find Files

import java.awt.FileDialog; // File Picker

import javax.swing.JFrame; // JFrame

import java.nio.*;

// import java.nio.file.Paths;

class Files {

  public static void getApps(final File folder) {
      for (final File file : folder.listFiles()) {
              String fileName = file.getName();
              // System.out.println(fileName);
              // System.out.println(file.getPath());
              final File subfolder = new File(file.getPath()+"/Contents/Resources");
              if (subfolder.exists()) {
                String icon = pickFile(subfolder.getPath());
                if (icon == null) return;
                System.out.println("App Name: " + fileName);
                System.out.println("Icon Name: " + icon);
              } else {
                System.out.println("Directory not found...");
              }
      }
  }

  public static String pickFile(String path) {
    FileDialog dialog = new FileDialog(new JFrame(), "Select File to Open");
    dialog.setMode(FileDialog.LOAD);
    dialog.setFilenameFilter((File dir, String name) -> name.endsWith(".icns"));
    dialog.setDirectory(path);
    dialog.setVisible(true);
    String fileChosen = dialog.getFile();
    return fileChosen;
  }

  public static void addAction(String cmd) {
    String text = "Text to save to file";
    Files.write(Paths.get("/Users/Andrew/Desktop/testfile.txt"), text.getBytes());
  }

  public static void main (String[] args) {
    String action = "{\n\"BTTTouchBarButtonName\":\"Messages\",\n\"BTTTriggerType\":629,\n\"BTTTriggerClass\":\"BTTTriggerTypeTouchBar\",\n\"BTTPredefinedActionType\":49,\n\"BTTPredefinedActionName\":\"Launch Application \\/ Open File \\/ Start Apple Script …\",\n\"BTTLaunchPath\":\"file:\\/\\/\\/Applications\\/Messages.app\",\n\"BTTEnabled2\":1,\n\"BTTUUID\":\"F3089B96-FDEF-4D54-9DA8-9CCD3C7AF8A9\",\n\"BTTEnabled\":1,\n\"BTTRequiredModifierKeys\":1048576,\n\"BTTOrder\":1,\n   \"BTTIconData\":\"icondata\",\n\"BTTTriggerConfig\":{\n\"BTTTouchBarItemIconHeight\":22,\n\"BTTTouchBarItemIconWidth\":22,\n\"BTTTouchBarItemPadding\":0,\n\"BTTTouchBarFreeSpaceAfterButton\":\"5.000000\",\n\"BTTTouchBarButtonColor\":\"75.323769, 75.323769, 75.323769, 255.000000\",\n\"BTTTouchBarAlwaysShowButton\":\"1\",\n\"BTTTouchBarAlternateBackgroundColor\":\"0.000000, 0.000000, 0.000000, 0.000000\"\n}\n}";
    File f = new File("/Users/Andrew/Desktop/testfile.txt");
    try {f.createNewFile();}catch(Exception e){}
    addAction("open 'btt://add_new_trigger/?json="+action+"'");
  }

}

编辑：我正在使用JDK版本8-171 for Mac

Answer 1

Java编译器变得混乱，因为Files是您的类的名称，因此它正在您的类中查找write方法。尝试只留下这个导入：

import java.nio.file.Paths;

然后调用java.nio.file.Files的完整类名：

java.nio.file.Files.write(Paths.get("/Users/Andrew/Desktop/testfile.txt"), text.getBytes());

但是你应该处理你的IOException。添加导入和try / catch。这是你的类没有编译错误：

import java.io.File; // Find Files
import java.io.IOException;

import java.awt.FileDialog; // File Picker

import javax.swing.JFrame; // JFrame

import java.nio.file.Paths;

class Files {

  public static void getApps(final File folder) {
      for (final File file : folder.listFiles()) {
           String fileName = file.getName();
           // System.out.println(fileName);
           // System.out.println(file.getPath());
          final File subfolder = new File(file.getPath()+"/Contents/Resources");
          if (subfolder.exists()) {
              String icon = pickFile(subfolder.getPath());
              if (icon == null) return;
              System.out.println("App Name: " + fileName);
              System.out.println("Icon Name: " + icon);
          } else {
              System.out.println("Directory not found...");
          }
      }
  }

public static String pickFile(String path) {
    FileDialog dialog = new FileDialog(new JFrame(), "Select File to Open");
    dialog.setMode(FileDialog.LOAD);
    dialog.setFilenameFilter((File dir, String name) -> name.endsWith(".icns"));
    dialog.setDirectory(path);
    dialog.setVisible(true);
    String fileChosen = dialog.getFile();
    return fileChosen;
}

public static void addAction(String cmd) {
    String text = "Text to save to file";
    try{
    java.nio.file.Files.write( Paths.get("/Users/Andrew/Desktop/testfile.txt"), text.getBytes());

    }catch(IOException e){
         System.err.print("Handle your error!");
    }
} 

public static void main (String[] args) {
    String action = "{\n\"BTTTouchBarButtonName\":\"Messages\",\n\"BTTTriggerType\":629,\n\"BTTTriggerClass\":\"BTTTriggerTypeTouchBar\",\n\"BTTPredefinedActionType\":49,\n\"BTTPredefinedActionName\":\"Launch Application \\/ Open File \\/ Start Apple Script …\",\n\"BTTLaunchPath\":\"file:\\/\\/\\/Applications\\/Messages.app\",\n\"BTTEnabled2\":1,\n\"BTTUUID\":\"F3089B96-FDEF-4D54-9DA8-9CCD3C7AF8A9\",\n\"BTTEnabled\":1,\n\"BTTRequiredModifierKeys\":1048576,\n\"BTTOrder\":1,\n   \"BTTIconData\":\"icondata\",\n\"BTTTriggerConfig\":{\n\"BTTTouchBarItemIconHeight\":22,\n\"BTTTouchBarItemIconWidth\":22,\n\"BTTTouchBarItemPadding\":0,\n\"BTTTouchBarFreeSpaceAfterButton\":\"5.000000\",\n\"BTTTouchBarButtonColor\":\"75.323769, 75.323769, 75.323769, 255.000000\",\n\"BTTTouchBarAlwaysShowButton\":\"1\",\n\"BTTTouchBarAlternateBackgroundColor\":\"0.000000, 0.000000, 0.000000, 0.000000\"\n}\n}";
    File f = new File("/Users/Andrew/Desktop/testfile.txt");
    try {f.createNewFile();}catch(Exception e){}
    addAction("open 'btt://add_new_trigger/?json="+action+"'");
    }

}

Answer 2

就我而言，它是一个 JAVA 项目，类是用 Kotlin 编写的（复制粘贴），所以我添加了 Kotlin 依赖项，问题解决了。

即使导入了类

2 个答案: