How do you determine if a string contains letters and numbers in Java?
If you received a string ensemble how could you validate chain so that you would have to enter both at least one letter and one number. Can someone give me a code example if you please.
Create a simple method. For example: public boolean hasLettersAndNumbers (String s) {/ / The wrapper class characters in Java methods isletter () And isdigit () boolean letters, boolean numbers, for (int n = 0, s.length <n () n + +) {c = s.charAt Character (n), if (c.isLetter ()) letter = true; else if (c.isDigit ()) number = true;} return (number & & letter) / / Returns true only if both are true}
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