bingoohuang / patchca

Simple yet powerful CAPTCHA library written in Java. Original source at http://code.google.com/p/patchca/

patchca

Simple yet powerful CAPTCHA library written in Java. Original source at http://code.google.com/p/patchca/

patchca's Issues

the verification code is illegible

the verification code is sometimes normal, but sometimes it is illegible, and it is also illegible after being refreshed many times.
like this:

MathExprFactory

Code line number is 29;
private String evalExpr(String expr) {
try {
return "" + ((Double) engine.eval(expr)).intValue();
} catch (ScriptException e) {
return "error";
}
}

engine.eval(expr) convert to Double has occurred a ClassCastException:
java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Double

Not useable with OpenJDK 11 or newer

Caused by: java.lang.NoClassDefFoundError: Could not initialize class sun.font.SunFontManager
	at java.desktop/sun.font.FontDesignMetrics.getMetrics(Unknown Source)
	at java.desktop/sun.java2d.SunGraphics2D.getFontMetrics(Unknown Source)
	at com.github.bingoohuang.patchca.text.renderer.AbstractTextRenderer.convertToCharacters(AbstractTextRenderer.java:86)
	at com.github.bingoohuang.patchca.text.renderer.AbstractTextRenderer.draw(AbstractTextRenderer.java:67)
	at com.github.bingoohuang.patchca.service.AbstractCaptchaService.getCaptcha(AbstractCaptchaService.java:112)
...