Strings.isEmpty()和Strings.isBlank()的區別
阿新 • • 發佈:2021-06-30
Strings.isEmpty()-----當str為null或""時返回true,其他情況返回false
Strings.isBlank()-----當str為null,"",或空白字元時返回true,其他情況返回false
System.out.println(Strings.isEmpty(null));//true System.out.println(Strings.isEmpty("")); // true System.out.println(Strings.isEmpty(" ")); //false System.out.println(Strings.isEmpty("bob")); //false System.out.println(Strings.isEmpty(" bob "));//false ---------------------------------------------------------------- System.out.println(Strings.isBlank(null)); //true System.out.println(Strings.isBlank(""));//true System.out.println(Strings.isBlank(" "));// true System.out.println(Strings.isBlank("\t \n \f \r"));//true //對於製表符、換行符、換頁符和回車符 System.out.println(Strings.isBlank("bob"));//false System.out.println(Strings.isBlank(" bob "));//false System.out.println(Strings.isBlank("\b")); //false //"\b"為單詞邊界符
參考自csdn部落格:https://blog.csdn.net/lazy_cat_go/article/details/105280664