String class in Java provides some utility method to perform this case conversion. You can use toUpperCase() to convert any lower case String to uppercase and toLowerCase() to convert any uppercase String to lowercase. Key thing to remember while using toUpperCase() and toLowerCase() is ...
import java.util.Scanner; public class JavaStringToUpperCase { public static void main(String[] args) { String str = "hello World!"; String strUpperCase = str.toUpperCase(); System.out.println("Java String to Upper Case: " + strUpperCase); readUserInputAndPrintInUpperCase(); } private ...
importorg.apache.commons.lang3.StringUtils;//导入方法依赖的package包/类publicstaticStringgetSearchableTextOld(String... strings){ Set<String> allUppercaseSubstrings =newLinkedHashSet<>();for(String sourceString : strings) { String string = StringUtils.upperCase(StringUtils.trimToNull(sourceString));...
importorg.languagetool.tools.StringTools;//导入方法依赖的package包/类privatebooleanisNotAllUppercase(String str){ String[] parts = str.split(" ");for(String part : parts) {if(isHyphenIgnored() || !"-".equals(part)) {// do not treat '-' as an upper-case wordif(StringTools.isAllUp...
Java String toUpperCase() transforms a string by replacing all lowercase characters to uppercase while leaving any characters already in uppercase.
In this chapter you will learn: Is Character a upper/lower Case The following code usesCharacter.isUpperCasemethod to tell is a char a uppercase char publicclassMain {publicstaticvoidmain(String[] args) {charsymbol ='A';/*fromjava2s.com*/if(Character.isUpperCase(symbol)) { System.out.print...
javacharuppercase 86 我该如何将变量f和l转换为大写字母? String lower = Name.toLowerCase(); int a = Name.indexOf(" ",0); String first = lower.substring(0, a); String last = lower.substring(a+1); char f = first.charAt(0); char l = last.charAt(0); System.out.println(l); ...
Java Program to find duplicate Characters in a String How to convert Char Array to String in java How to convert String to Char Array in java Java Program to Check Whether a Character is Alphabet or Not Java Program to check a Character is Vowel or Consonant Program to find frequency of ...
javaperformanceasciiuppercaselowercase 4 这是一个关于性能的问题。我可以使用以下代码将大写字母转换为小写字母,反之亦然: 从小写字母转换为大写字母: // Uppercase letters. class UpperCase { public static void main(String args[]) { char ch; for (int i = 0; i < 10; i++) { ch = (char) ...
These two methods transform a string into all uppercase or all lowercase letters. They both return the transformed result. These methods do not change the original string. The original string remains intact with mixed case. A practical area in which these methods are useful is when storing inf...