俺的java基础不太好,所以每天都要花时间来熟悉java;
将每天学的东西贴上来:
1. Constructing a Filename Path
String path = File.separator + "a" + File.separator + "b";
System.out.println("-----------> "+path);
2.Creating a File
File file = new File("filename.txt");
// Create file if it does not exist
boolean success = file.createNewFile();
3.Getting the Size of a File
File file = new File("filename.txt");
// Get the number of bytes in the file
long length = file.length();
System.out.println("length------------->"+length);
4.Renaming a File or Directory
// File (or directory) with old name
File file = new File("filename.txt");
// File (or directory) with new name
File file2 = new File("file.txt");
// Rename file (or directory)
boolean success = file.renameTo(file2);
if (!success) {
// File was not successfully renamed
}
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