1、【toUpperCase()】的意思是将所有的英文字符转换为大写字母，如：String cc = “aBc123”.toUpperCase(); 结果就是：ABC123。2、【toLowerCase()】的意思是将所有的英文字符转换为小写字母，如：String cc = “aBc”.toUpperCase(); 结果就是：abc123。下面是一个完整的例子代码，里面运用到了【toUpperCase()】和【toLowerCase()】方法...
toUpperCase() 的第二种方法变体,使用给定 Locale 的规则将所有字符转换为大写。 返回 大写字母的字符串。 Java String toUpperCase() 方法示例 publicclassStringUpperExample{publicstaticvoidmain(String args[]){ String s1="hello string"; String s1upper=s1.toUpperCase(); System.out.println(s1upper); }} ...
*@version创建时间:2015年4月28日 下午12:47:26 * 类说明*/publicclassUppserOrLower {privatestaticScanner console;publicstaticvoidmain(String[] args) { System.out.print("请输入一组字符串:"); console=newScanner(System.in); String str=console.nextLine(); StringBuilder upperStr=newStringBuilder();...
importjava.lang.String;importjava.util.Scanner;publicclassMain{publicstaticvoidmain(String[] args){ Scanner cin=newScanner(System.in); String s=cin.next(); System.out.format("%s\n",s.toLowerCase());//全部转为小写System.out.format("%s\n",s.toUpperCase()); } }...
public static void main(String[] args) { System.out.print("请输入一组字符串:"); console = new Scanner(System.in); String str = console.nextLine(); StringBuilder upperStr = new StringBuilder(); StringBuilder lowerStr = new StringBuilder(); ...
❮ String Methods ExampleGet your own Java Server Convert a string to upper case and lower case letters: String txt = "Hello World"; System.out.println(txt.toUpperCase()); System.out.println(txt.toLowerCase()); Try it Yourself » Definition...
java.langStringtoUpperCase Javadoc Show more Converts all of the characters in this String to upper case using the rules of the default locale. This method is equivalent to toUpperCase(Locale.getDefault()). Note: This method is locale sensitive, and may produce unexpected results if used for...
描述(Description) java.lang.String.toUpperCase()方法使用默认语言环境的规则将此String中的所有字符转换为大写。 声明 (Declaration) 以下是java.…
问Java String.toUpperCase()会失败吗？EN最近，我被一款叫做 ChatGPT 的人工智能（AI）聊天机器人，...
In this article, we will learn how to convert all characters in a string to uppercase using the toUpperCase() method in Java. This method has two versions: one that uses the system's default language settings and another that lets you choose a specific language. Changing string characters ...