Java 7 for Absolute Beginners

CHAPTER 8 ■ WRITING AND READING FILES

String tempDirectoryName = "C:" + File.separator + "test";

File tempDirectory = new File(tempDirectoryName);

for (int i = 0; i < 10; i++) {

try {

File thisFile =

File.createTempFile("tmp", null, tempDirectory);

} catch (Exception e) {

System.out.println("Couldn't create temp file " + i);

}

}

System.out.println("Done creating temp files");

}

}

The createTempFile method guarantees that each temp file created during the life of the program

will be different. It doesn't guarantee that the file names will mean anything to a human. Listing 8-6

shows the names of the files that program created in our test directory.

Listing 8-6. Temp file names

tmp1672349819571008723.tmp

tmp3234113842230809615.tmp

tmp5343720775549909618.tmp

tmp6194798942830449846.tmp

tmp7016714774703888253.tmp

tmp720922773409895465.tmp

tmp7634665877605496722.tmp

tmp7730975525106591320.tmp

tmp799007629249445444.tmp

tmp8048303951856646489.tmp

Figure 8-5 shows the temp files after they've been created in my test directory.

Figure 8-5. Temp files in the test directory