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  1. class Main {
  2. 	public static void main (String[] args) {
  3. 		String x = "1234";
  4. 		System.out.println(x.charAt(0) >= '0' && x.charAt(0) <= '9');
  5. 		x = "a123";
  6. 		System.out.println(x.charAt(0) >= '0' && x.charAt(0) <= '9');
  7. 	}
  8. }
  9.  
  10. //https://pt.stackoverflow.com/q/111739/101
Success #stdin #stdout 0.06s 32296KB
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stdin
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Standard input is empty
stdout
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true
false
https://ideone.com/2N1uHM
language:
Java (12.0.1)
created:
4 years ago
visibility:
secret

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