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字符串toLowerCase()方法 (String toLowerCase() Method)

toLowerCase() method is a String class method, it is used to convert given string into the lowercase.

toLowerCase()方法是String類方法，用于將給定的字符串轉換為小寫。

Syntax:

句法：

    String String_object.toLowerCase();

Here, String_object is a String object which we have to convert into lowercase. The method does not change the string; it returns the lowercase converted string.

在這里， String_object是一個String對象，我們必須將其轉換為小寫形式。 該方法不更改字符串。 它返回小寫轉換后的字符串。

Example:

例：

    Input:
str = "Welcome at IncludeHelp!"
Function call:
ans = str.toLowerCase()
Output:
ans = "welcome at includehelp!"

Code:

碼：

public class Main
{
public static void main(String[] args) {
String str = "Welcome at IncludeHelp!";
String ans = str.toLowerCase();
System.out.println("str = " + str);
System.out.println("ans = " + ans);		
}
}

Output

輸出量

str = Welcome at IncludeHelp!
ans = welcome at includehelp!

翻譯自: https://www.includehelp.com/java/string-toLowerCase-method-with-example.aspx

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