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Java 8 validate based on pair of strings

Pair<Integer, String> pair = new Pair<>(1, "One");
Integer key = pair.getKey();
String value = pair.getValue();

Source: baeldung.com

Java 8 validate based on pair of strings

String input = "one=1&two=2";
Pattern p = Pattern.compile("^(?:\\w*=\\d*(?:&|$))+$");
Matcher m = p.matcher(input);
if (m.matches()) System.out.println("Matches!");

Source: stackoverflow.com

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