There is a bug in java.awt.datatransfer.MimeTypeParameterList#skipWhiteSpace which could lead to unexpected StringIndexOutOfBoundsException.
Can be triggered with this single line:

        new java.awt.datatransfer.DataFlavor(" / ; ");

which results in

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55)
at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52)
at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213)
at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210)
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
at java.base/java.lang.String.checkIndex(String.java:4570)
at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:46)
at java.base/java.lang.String.charAt(String.java:1527)
at java.datatransfer/java.awt.datatransfer.MimeTypeParameterList.skipWhiteSpace(MimeTypeParameterList.java:332)
at java.datatransfer/java.awt.datatransfer.MimeTypeParameterList.parse(MimeTypeParameterList.java:132)
at java.datatransfer/java.awt.datatransfer.MimeTypeParameterList.<init>(MimeTypeParameterList.java:55)
at java.datatransfer/java.awt.datatransfer.MimeType.parse(MimeType.java:173)
at java.datatransfer/java.awt.datatransfer.MimeType.<init>(MimeType.java:67)
at java.datatransfer/java.awt.datatransfer.DataFlavor.initialize(DataFlavor.java:523)
at java.datatransfer/java.awt.datatransfer.DataFlavor.<init>(DataFlavor.java:501)