36 lines
1.3 KiB
Java
36 lines
1.3 KiB
Java
|
Working with Temporary files
|
||
|
|
|
||
|
|
import java.io.*;
|
||
|
|
|
||
|
|
//Work with temporary files in Java.
|
||
|
|
|
||
|
|
public class TempFiles {
|
||
|
|
public static void main(String[] argv) throws IOException {
|
||
|
|
|
||
|
|
// 1. Make an existing file temporary
|
||
|
|
|
||
|
|
// Construct a File object for the backup created by editing
|
||
|
|
// this source file. The file probably already exists.
|
||
|
|
// My editor creates backups by putting ' at the end of the name.
|
||
|
|
File bkup = new File("Rename.java'");
|
||
|
|
// Arrange to have it deleted when the program ends.
|
||
|
|
bkup.deleteOnExit();
|
||
|
|
|
||
|
|
// 2. Create a new temporary file.
|
||
|
|
|
||
|
|
// Make a file object for foo.tmp, in the default temp directory
|
||
|
|
File tmp = File.createTempFile("foo", "tmp");
|
||
|
|
// Report on the filename that it made up for us.
|
||
|
|
System.out.println("Your temp file is " + tmp.getCanonicalPath());
|
||
|
|
// Arrange for it to be deleted at exit.
|
||
|
|
tmp.deleteOnExit();
|
||
|
|
// Now do something with the temporary file, without having to
|
||
|
|
// worry about deleting it later.
|
||
|
|
writeDataInTemp(tmp.getCanonicalPath());
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void writeDataInTemp(String tempnam) {
|
||
|
|
// This version is dummy. Use your imagination.
|
||
|
|
}
|
||
|
|
}
|