1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /**
  25  * @test
  26  * @bug 8015334
  27  * @summary Memory leak with kerning.
  28  */
  29 
  30 import java.awt.Font;
  31 import java.awt.FontMetrics;
  32 import java.awt.font.FontRenderContext;
  33 import java.awt.font.TextAttribute;
  34 import java.awt.font.TextLayout;
  35 import java.util.HashMap;
  36 import java.util.Map;
  37 
  38 public class KerningLeak {
  39 
  40     public static void main(String[] args) {
  41         Map<TextAttribute, Object> textAttributes = new HashMap<>();
  42         textAttributes.put(TextAttribute.FAMILY, "Sans Serif");
  43         textAttributes.put(TextAttribute.SIZE, 12);
  44         textAttributes.put(TextAttribute.KERNING, TextAttribute.KERNING_ON);
  45         Font font = Font.getFont(textAttributes);
  46         int totalAdvance = 0;
  47         FontRenderContext frc = new FontRenderContext(null, false, false);
  48         for (int i = 0; i < 500; i++) {
  49             if (i % 10 == 0) System.out.println("Starting iter " + (i+1));
  50             for (int j = 0; j <1000; j++) {
  51                 TextLayout tl = new TextLayout(Integer.toString(j), font, frc);
  52                 totalAdvance += tl.getAdvance();
  53             }
  54         }
  55         System.out.println("done " + totalAdvance);
  56     }
  57 }