package onlyfun.caterpillar;
import java.io.*;
import java.util.*;
public class FileDemo {
public static void main(String[] args) {
try {
File file = new File(args[0]);
if(file.isFile()) { // 是否为文件
System.out.println(args[0] + " 文件");
System.out.print(
file.canRead() ? "可读" : "不可读");
System.out.print(
file.canWrite() ? "可写" : "不可写");
System.out.println(
file.length() + "字节");
}
else {
// 列出所有的文件及目录
File[] files = file.listFiles();
ArrayList<File> fileList =
new ArrayList<File>();
for(int i = 0; i < files.length; i++) {
// 先列出目录
if(files[i].isDirectory()) { //是否为目录
// 取得路径名
System.out.println("[" +
files[i].getPath() + "]");
}
else {
// 文件先存入fileList，待会再列出
fileList.add(files[i]);
}
}
// 列出文件
for(File f: fileList) {
System.out.println(f.toString());
}
System.out.println();
}
}
catch(ArrayIndexOutOfBoundsException e) {
System.out.println(
"using: java FileDemo pathname");
}
}
}
Javajdk5学习笔记 （665个子文件） 
JNotePadUI.class 7KB ObjectStreamDemo.class 3KB SequenceStreamDemo.class 3KB JNotePadUI.class 3KB CommandUtil.class 2KB JNotePadUI.class 2KB SimpleClassViewer.class 2KB RandomAccessFileDemo.class 2KB CharArrayReaderWriterDemo.class 2KB ByteArrayStreamDemo.class 2KB LogHandler.class 2KB InvokeMethodDemo.class 2KB CalendarDemo.class 2KB FileDemo.class 2KB AnalysisApp.class 2KB NewInstanceDemo2.class 1KB StreamWriterDemo.class 1KB DataStreamDemo.class 1KB BufferedStreamDemo.class 1KB AssignFieldDemo.class 1KB SimpleThreadLogger.class 1KB ReaderDemo.class 1KB UseRegularExpression.class 1KB ClassLoaderDemo.class 1KB ForNameDemo.class 1KB FileStreamDemo.class 1KB PushbackReaderDemo.class 1KB NewInstanceDemo.class 1KB ArraysMethodDemo.class 1KB LoggerHierarchyDemo.class 1KB PushbackStreamDemo.class 1KB IteratorDemo.class 1KB IteratorDemo.class 1KB StreamReaderWriterDemo.class 1KB DataRange.class 1KB ArrayDemo.class 1KB EnhancedForDemo.class 1KB EnhancedForDemo.class 1KB EraserDemo.class 1KB AverageInput.class 1KB HashSetDemo.class 1KB HashSetDemo.class 1KB BufferedReaderWriterDemo.class 1KB ArrayListDemo.class 1KB ArrayListDemo.class 1KB NewArrayDemo.class 1KB CheckedExceptionDemo.class 1KB NewArrayDemo2.class 1KB DetailAction3.class 1KB Eraser.class 1KB Process$Current.class 1KB DateTimeInstanceDemo2.class 1KB StringDemo.class 1KB CharAtString.class 1KB EraserThreadDemo.class 1KB QueueDemo.class 1KB QueneDemo.class 1KB QueueDemo.class 1KB LoggingLevelDemo3.class 1KB NewArraysDemo.class 1KB StringStackDemo.class 1KB StringStackDemo.class 1KB DetailAction2.class 1KB StringQueueDemo.class 1KB StringQueueDemo.class 1KB EraserThread.class 1KB MoreAction2.class 1KB HashMapDemo2.class 1KB HashMapDemo2.class 1KB CloneDemo.class 1KB ClassDemo.class 1KB ThreadLocal.class 1KB TreeSetDemo2.class 1KB TreeSetDemo2.class 1KB EnumSetDemo.class 1KB EnumSetDemo.class 1KB MoreAction.class 1KB TreeMapDemo2.class 1KB EnumMapDemo2.class 1KB TreeMapDemo2.class 1KB EnumMapDemo2.class 1KB LoggingLevelDemo2.class 1KB FileReaderWriterDemo.class 1KB EnumSetDemo2.class 1KB EnumSetDemo2.class 1KB DetailAction.class 1KB SafeArray.class 1KB AdvancedArray.class 1KB DateTimeInstanceDemo.class 1KB StringDemo.class 1KB UserLogin.class 1KB PersonalInfo.class 1KB LinkedHashSetDemo.class 1016B LinkedHashSetDemo.class 1016B LinkedHashMapDemo.class 1008B LinkedHashMapDemo.class 1006B ForNameDemoV2.class 1004B TreeSetDemo.class 1000B TreeSetDemo.class 1000B TextModeGame.class 998B共 665 条
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