Detect Latin Symbols in TrueType and Type1 Fonts using Java | https://blog.aspose.com/2021/08/17/detect-latin-symbols-in-truetype-and-type1-fonts-using-java/

01_Detect_Latin_Symbols_in_TrueType_and_Type1_Fonts_using_Java.md

You can find detailed information at: Detect Latin Symbols in TrueType and Type1 Fonts using Java

Detect_Latin_Symbols_In_TrueType_Fonts.java

// Font file path
String fileName = Utils.getDataDir() + "Montserrat-Regular.ttf"; //Font file name with full path

// Load the font file
FontDefinition fd = new FontDefinition(FontType.TTF, new FontFileDefinition("ttf", new FileSystemStreamSource(fileName)));
TtfFont ttfFont = (TtfFont) Font.open(fd);

boolean latinText = true;

// Check for the support of latin symbols
for (int code = 65; code < 123; code++)
{
    GlyphId gid = ttfFont.getEncoding().decodeToGid(code);
    if (gid == null || gid == GlyphUInt32Id.getNotDef())
    {
        latinText = false;
    }
}

if (latinText)
{
    System.out.println(MessageFormat.format("Font {0} supports latin symbols.", ttfFont.getFontName()));
}
else
{
    System.out.println(MessageFormat.format("Latin symbols are not supported by font {0}.", ttfFont.getFontName()));
}

Detect_Latin_Symbols_In_Type1_Fonts.java

// Font file path
String fileName = Utils.getDataDir() + "courier.pfb"; //Font file name with full path

// Load the font file
FontDefinition fd = new FontDefinition(FontType.Type1, new FontFileDefinition("pfb", new FileSystemStreamSource(fileName)));
Type1Font font = (Type1Font) Font.open(fd);

boolean latinText = true;

// Check for the support of latin symbols
for (int code = 65; code < 123; code++)
{
    GlyphId gid = font.getEncoding().decodeToGid(code);
    if (gid == null || gid == GlyphUInt32Id.getNotDef())
    {
        latinText = false;
    }
}

if (latinText)
{
    System.out.println(MessageFormat.format("Font {0} supports latin symbols.", font.getFontName()));
}
else
{
    System.out.println(MessageFormat.format("Latin symbols are not supported by font {0}.", font.getFontName()));
}