我刚刚升级到El Capitan，我在启动在JDK1.7.0u79下运行的自定义JavaFX2应用程序时出现问题（Oracle提供的最新版本）。
启动应用时，我遇到了这个例外：
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, Generics.Collections, StdCtrls;
type
TStarCoords = packed record
szSystem: string[40];
fCoordX: Single;
fCoordY: Single;
fCoordZ: Single;
end;
const
SYSTEMS = 'Data\Systems.csv';
type
TForm1 = class(TForm)
ComboBox1: TComboBox;
procedure FormCreate(Sender: TObject);
procedure ComboBox1Change(Sender: TObject);
private
SystemCoords: TDictionary<string, TStarCoords>;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.ComboBox1Change(Sender: TObject);
var
StarCoord: TStarCoords;
begin
if not SystemCoords.TryGetValue(ComboBox1.Text, StarCoord) then
exit; //todo : Make some error handling
Caption := FloatToStr(StarCoord.fCoordX);
end;
procedure TForm1.FormCreate(Sender: TObject);
var
Lines, Elements: TStringlist;
Line: string;
SystemCoord: TPair<string, TStarCoords>;
begin
if not FileExists(ExtractFilePath(ParamStr(0)) + SYSTEMS) then
exit; //todo: Some error handling
SystemCoords := TDictionary<string, TStarCoords > .Create;
Lines := TStringlist.Create;
Elements := TStringlist.Create;
Elements.LineBreak := ',';
try
for Line in Lines do
begin
Elements.Text := Line;
SystemCoord.Key := Elements[0];
with SystemCoord.Value do
begin
szSystem := string(Elements[0]);
fCoordX := StrToFloat(Elements[1]);
fCoordY := StrToFloat(Elements[2]);
fCoordZ := StrToFloat(Elements[3]);
end;
SystemCoords.Add(SystemCoord.Key, SystemCoord.Value);
end;
finally
Lines.Free;
Elements.Free;
end;
try
ComboBox1.Items.BeginUpdate;
for SystemCoord in SystemCoords do
ComboBox1.Items.Add(SystemCoord.Key);
finally
ComboBox1.Items.EndUpdate;
end;
end;
end.
我不能将应用程序迁移到Java 8，因此非常感谢任何帮助。
更新
我已经能够通过将其添加到我的main方法的开头来再次运行应用程序。那里有更好的解决方案吗？
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:403)
at com.sun.javafx.application.LauncherImpl.access$000(LauncherImpl.java:47)
at com.sun.javafx.application.LauncherImpl$1.run(LauncherImpl.java:115)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:191)
at javafx.scene.control.Control.loadClass(Control.java:115)
at javafx.scene.control.Control.loadSkinClass(Control.java:1021)
at javafx.scene.control.Control.access$500(Control.java:70)
at javafx.scene.control.Control$12.invalidated(Control.java:972)
at javafx.beans.property.StringPropertyBase.markInvalid(StringPropertyBase.java:127)
at javafx.beans.property.StringPropertyBase.set(StringPropertyBase.java:161)
at com.sun.javafx.css.StyleableStringProperty.set(StyleableStringProperty.java:71)
at javafx.scene.control.Control$12.set(Control.java:964)
at com.sun.javafx.css.StyleableStringProperty.applyStyle(StyleableStringProperty.java:59)
at com.sun.javafx.css.StyleableStringProperty.applyStyle(StyleableStringProperty.java:31)
at com.sun.javafx.css.StyleableProperty.set(StyleableProperty.java:70)
at com.sun.javafx.css.StyleHelper.transitionToState(StyleHelper.java:900)
at javafx.scene.Node.impl_processCSS(Node.java:7418)
at javafx.scene.Parent.impl_processCSS(Parent.java:1146)
at javafx.scene.control.Control.impl_processCSS(Control.java:1154)
at javafx.scene.Parent.impl_processCSS(Parent.java:1153)
at javafx.scene.Parent.impl_processCSS(Parent.java:1153)
at javafx.scene.Node.processCSS(Node.java:7386)
at javafx.scene.Scene.doCSSPass(Scene.java:454)
at javafx.scene.Scene.preferredSize(Scene.java:1468)
at javafx.scene.Scene.impl_preferredSize(Scene.java:1535)
at javafx.stage.Window$9.invalidated(Window.java:717)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:127)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:161)
at javafx.stage.Window.setShowing(Window.java:781)
at javafx.stage.Window.show(Window.java:796)
at javafx.stage.Stage.show(Stage.java:233)
at au.com.religaresecurities.trademax.client.Start.start(Start.java:131)
at com.sun.javafx.application.LauncherImpl$5.run(LauncherImpl.java:319)
at com.sun.javafx.application.PlatformImpl$5.run(PlatformImpl.java:219)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:182)
at com.sun.javafx.application.PlatformImpl$4$1.run(PlatformImpl.java:179)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl$4.run(PlatformImpl.java:179)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:76)
Caused by: java.lang.NullPointerException
at com.sun.t2k.MacFontFinder.initPSFontNameToPathMap(MacFontFinder.java:339)
at com.sun.t2k.MacFontFinder.getFontNamesOfFontFamily(MacFontFinder.java:390)
at com.sun.t2k.T2KFontFactory.getFontResource(T2KFontFactory.java:233)
at com.sun.t2k.LogicalFont.getSlot0Resource(LogicalFont.java:184)
at com.sun.t2k.LogicalFont.getSlotResource(LogicalFont.java:228)
at com.sun.t2k.CompositeStrike.getStrikeSlot(CompositeStrike.java:86)
at com.sun.t2k.CompositeStrike.getMetrics(CompositeStrike.java:132)
at com.sun.javafx.font.PrismFontUtils.getFontMetrics(PrismFontUtils.java:31)
at com.sun.javafx.font.PrismFontLoader.getFontMetrics(PrismFontLoader.java:466)
at javafx.scene.text.Text.<init>(Text.java:153)
at javafx.scene.text.Text.<init>(Text.java:162)
at com.sun.javafx.scene.control.skin.ProgressIndicatorSkin.<clinit>(ProgressIndicatorSkin.java:78)
... 37 more
答案 0 :(得分：10)
在广泛的企业应用程序中使用了一周以上之后，我没有注意到UI中的任何问题。
由于缺乏更好的解决方案，我接受上面的更新作为答案。也许它有助于某人...
我已经能够通过将其添加到我的main方法的开头来再次运行应用程序。
try {
Class<?> macFontFinderClass = Class.forName("com.sun.t2k.MacFontFinder");
Field psNameToPathMap = macFontFinderClass.getDeclaredField("psNameToPathMap");
psNameToPathMap.setAccessible(true);
psNameToPathMap.set(null, new HashMap<String, String>());
} catch (Exception e) {
// ignore
}
答案 1 :(得分：3)
这不是一个直接的答案，但是我认为重要的是要传递这个bug已经在即将发布的Java版本中被识别和修复。见https://bugs.openjdk.java.net/browse/JDK-8143907
答案 2 :(得分：-1)
我遇到了同样的问题。我将文本更改为标签。我不确定你的情况是否可行。