better way to check string on null and empty java

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Gemma
07 Sep 2020
1if(str != null && !str.isEmpty()) { /* do your stuffs here */ }
source
Chiara
18 Aug 2019
1/* You can use Apache Commons  */
2StringUtils.isEmpty(str)
3  
4/* which checks for empty strings and handles null gracefully. */
5  
6/*   HINT   */  
7/* the shorter and simler your code, the easier it is to test it */
source
Hanna
07 Aug 2018
1public class Null {
2 
3	public static boolean isNullOrEmpty(String str) {
4        if(str != null && !str.isEmpty())
5            return false;
6        return true;
7    }
8}
Juan Sebastián
31 Feb 2016
1if(str != null && !str.isEmpty())
2Be sure to use the parts of && in this order, because java will not proceed to evaluate the second part if the first part of && fails, thus ensuring you will not get a null pointer exception from str.isEmpty() if str is null.
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