问题
I have added a font to my JAR file from eclipse and am trying to use the font within JTextFields. The setText isn't being drawn when I run the application, just a - in the JTextField. I based my code off Exporting font to jar in eclipse.
Below is my code:
//lets load the font
Font font = Font.createFont(Font.TRUETYPE_FONT, Main.class.getClassLoader().getResourceAsStream("Coalition_v2.ttf"));
font.deriveFont(Font.PLAIN, 14);
txtBrain = new JTextField();
txtBrain.setFont(font);
txtBrain.setText("BRAIN");
txtBrain.setHorizontalAlignment(SwingConstants.CENTER);
txtBrain.setEditable(false);
txtBrain.setColumns(10);
txtBrain.setBounds(521, 727, 90, 40);
contentPane.add(txtBrain);
I know the font is in the correct place as if I change the .getResourceAsStream to /Coalition_v2.ttf then I get the following error from the console:
java.io.IOException: Problem reading font data.
at java.awt.Font.createFont(Font.java:946)
The Font file is contained within /src/
Output of Jar -tvf as requested:
0 Sun Mar 31 09:51:56 BST 2013 ngd/
0 Sun Mar 31 09:51:56 BST 2013 ngd/co/
0 Sun Mar 31 09:51:56 BST 2013 ngd/co/uk/
0 Sun Mar 31 09:51:56 BST 2013 ngd/co/uk/TabSync/
806 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About$1.class
556 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About$2.class
4762 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About.class
1802 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/Help.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$1.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$10.class
1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$11.class
1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$12.class
1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$13.class
1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$14.class
1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$15.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$16.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$17.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$18.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$19.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$2.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$20.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$21.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$22.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$23.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$24.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$25.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$26.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$27.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$28.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$29.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$3.class
735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$30.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$31.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$32.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$33.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$34.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$35.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$36.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$37.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$38.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$39.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$4.class
1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$40.class
4765 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$41.class
723 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$42.class
1185 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$43.class
697 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$44.class
1220 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$45.class
995 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$46.class
781 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$47.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$5.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$6.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$7.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$8.class
733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$9.class
2097 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$Field1Listener.class
47217 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main.class
1260 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/FileFiltererpdf.class
1260 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/FileFiltererjpg.class
991552 Wed Jul 27 19:13:00 BST 2011 ngd/co/uk/TabSync/Coalition_v2.ttf
991552 Wed Jul 27 19:13:00 BST 2011 Coalition_v2.ttf
409717 Thu Mar 21 14:15:32 GMT 2013 nullpdf.pdf
163009 Thu Mar 21 14:29:08 GMT 2013 Javasplash.jpg
The code is being run from Main.class.
EDITED:
Code now looks like this:
Font font = Font.createFont(Font.TRUETYPE_FONT, this.getClass().getResourceAsStream("/Coalition_v2.ttf")).deriveFont(Font.PLAIN, 14);
System.out.println(font)
Sorted. Thanks for your help, and Andrew for your steer in the right direction.
回答1:
Change
.. Main.class.getClassLoader().getResourceAsStream("Coalition_v2.ttf") ..
..to something more like..
.. this.getClass().getResource("/Coalition_v2.ttf") // note leading '/' ..
..for an URL then print it out to check it is found.
The leading / means 'look for the root of the class-path' as opposed to from the current package or directory.
回答2:
There is pretty strange exception handling in createFont method. If FontFormatException or IOException catched, then it just rethrown. In all other cases will be rethrown:
throw new IOException("Problem reading font data.");
So your actually issue is even not the IO problem.
First of all take a look at this point. There is such code in this method:
final File tFile = AccessController.doPrivileged(
new PrivilegedExceptionAction<File>() {
public File run() throws IOException {
return File.createTempFile("+~JF", ".tmp", null);
}
}
);
It tries to write into temp directory. You should check if your programm have access to do that.
回答3:
Solution in case anyone finds this from google was:
Font font = Font.createFont(Font.TRUETYPE_FONT, this.getClass().getResourceAsStream("/Coalition_v2.ttf")).deriveFont(Font.PLAIN, 14);
System.out.println(font)
Andy
来源：https://stackoverflow.com/questions/15728006/using-font-from-my-jar