Java String toLowerCase()用法及代碼示例

Java字符串toLowerCase()方法將字符串的所有字符轉換為小寫字母。 toLowerCase()方法有兩種類型。

簽名：

public String toLowerCase(Locale loc) 
and
public String toLowerCase() 
參數：
loc- locale value to be applied. converts all the characters into 
lowercase using the rules of given Locale.  
返回： 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); 
    } 
}

輸出：

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); 
    } 
}

輸出：

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

相關用法

注：本文由純淨天空篩選整理自Niraj_Pandey大神的英文原創作品 Java String toLowerCase() with examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。