Java字符串toLowerCase（）及其示例-yiteyi-C++库

这个 java字符串toLowerCase（） 方法将字符串的所有字符转换为小写字母。有两种类型的 toLowerCase（） 方法

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签名：

public String toLowerCase(Locale loc) 
and
public String toLowerCase() 
Parameter:
loc- locale value to be applied. converts all the characters into 
lowercase using the rules of given Locale.  
Returns: returns string in lowercase letter.

                     // Java program to demonstrate                   
                     // working of toLowerCase() method                   
                             
                     class                               Gfg {                   
                                         public                               static                               void                               main(String args[])                   
                                         {                   
                                         String s =                               "Welcome! to Geeksforgeeks Planet."                               ;                   
                             
                                         // converting string s to lowercase letter                   
                                         String gfg1 = s.toLowerCase();                   
                                         System.out.println(gfg1);                   
                                         }                   
                     }                   

输出：

welcome! to geeksforgeeks planet.

                     // Java program to demonstrate                   
                     // working of Locale class in                   
                     // toLowerCase() method                   
                     import                               java.util.Locale;                   
                     class                               Gfg {                   
                                         public                               static                               void                               main(String args[])                   
                                         {                   
                                         String s =                               "I Know YOI Bui You Don't Know ME."                               ;                   
                             
                                         // Locales with the language "tr" for TURKISH                   
                                         //"en" for ENGLISH is created                   
                                         Locale TURKISH = Locale.forLanguageTag(                               "tr"                               );                   
                                         Locale ENGLISH = Locale.forLanguageTag(                               "en"                               );                   
                             
                                         // converting string s to lowercase letter                   
                                         // using TURKISH and ENGLISH language                   
                                         String gfg2 = s.toLowerCase(TURKISH);                   
                                         String gfg3 = s.toLowerCase(ENGLISH);                   
                                         System.out.println(gfg2);                   
                                         System.out.println(gfg3);                   
                                         }                   
                     }                   

输出：

? know yo? bui you don't know me.
i know yoi bui you don't know me.

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