How to convert String to Long?

Use below snippet : public static Long convertStringToLong(String stringValue) { try{ NumberFormat numberFormat = NumberFormat.getInstance(); Number number = numberFormat.parse(stringValue); return number.longValue(); }catch(Exception e){ return null; } }  

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Why string is immutable in java?

String pool is possible only because String is immutable in Java. This way Java Runtime frees a lot of heap space because different String variables can refer to the same …

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How To Convert rtf To String In Java?

public String convertRtfToText(String fareRules) throws IOException, BadLocationException { try { byte[] x = Base64.getDecoder().decode(fareRules.getBytes()); RTFEditorKit rtfParser = new RTFEditorKit(); Document document = rtfParser.createDefaultDocument(); rtfParser.read(new ByteArrayInputStream(x), document, 0); String fareRuleText = …

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