Konloch/bytecode-viewer · info · InputMismatchException

String is too long

Error message

String is too long

What it means

The string field handler throws InputMismatchException("String is too long") when the UTF-encoded bytes of the entered string exceed CACHE_SIZE — the values cache can only hold a fixed number of bytes (single code-area row worth), so oversized strings are rejected before arraycopy.

Source

Thrown at src/main/java/the/bytecode/club/bytecodeviewer/gui/hexviewer/ValuesPanel.java:635

            }
        }
    }//GEN-LAST:event_characterTextFieldKeyReleased

    private void stringTextFieldKeyReleased(java.awt.event.KeyEvent evt)
    {//GEN-FIRST:event_stringTextFieldKeyReleased
        if (evt.getKeyCode() == KeyEvent.VK_ENTER && isEditable())
        {
            try
            {
                String characterText = stringTextField.getText();

                if (characterText.length() == 0)
                    throw new InputMismatchException("Empty value not valid");

                byte[] bytes = characterText.getBytes(codeArea.getCharset());

                if (bytes.length > CACHE_SIZE)
                    throw new InputMismatchException("String is too long");

                System.arraycopy(bytes, 0, valuesCache, 0, bytes.length);

                modifyValues(bytes.length);
                updateValues();
            }
            catch (InputMismatchException ex)
            {
                showException(ex);
            }
        }
    }//GEN-LAST:event_stringTextFieldKeyReleased

    public void setCodeArea(CodeArea codeArea)
    {
        this.codeArea = codeArea;
    }

View on GitHub (pinned to 31430e0033)

Solutions

1. Shorten the string so its encoded byte length fits the cache.
2. Edit the string in several smaller chunks across rows.
3. Edit the underlying file directly (e.g. in a text editor or via the hex viewer) for long content.
4. Prefer ASCII text to avoid multi-byte expansion hitting the limit earlier.

Example fix

// before
stringTextField.setText("a very long string exceeding the cache limit..."); // throws
// after
stringTextField.setText("short"); // fits within CACHE_SIZE bytes

try {
    applyStringValue(stringTextField.getText());
} catch (InputMismatchException e) {
    setStatus("String exceeds " + CACHE_SIZE + " bytes; shorten it");
}

When it happens

Trigger: stringTextFieldKeyReleased where characterText.getBytes(codeArea.getCharset()).length > CACHE_SIZE; note byte length (not char length) counts, so multi-byte characters hit the limit sooner.

Common situations: Pasting long strings into the string field; strings with many non-ASCII characters inflating byte length; editing a small file/row where the cache is small.

Related errors

• Only single character allowed
• Empty value not valid
• Invalid Java .class file
• Value out of range

AI-assisted analysis of Konloch/bytecode-viewer@31430e0033 (2026-09-05). Data as JSON: /api/errors/f56f3da9165caeeb. Report an issue: GitHub.