Here is a complete example program to convert java string to uppercase and print it. package com.journaldev.string; import java.util.Scanner; public class JavaStringToUpperCase { public static void main(String[] args) { String str = "hello World!"; String strUpperCase = str.toUpperCase(); ...
方案一:使用正则表达式 可以使用正则表达式来匹配大写字母,通过判断是否匹配成功来判断字符数组中的字符是否都是大写字母。 publicbooleanisAllUpperCase(String[]array){Stringstr=String.join("",array);// 将字符数组转换为一个字符串returnstr.matches("^[A-Z]+$");// 使用正则表达式判断是否都是大写字母} 1...
System.out.println(upperCaseInput);// HELLO WORLD! 1. 2. 3. 4. 5. 6. 字符串比较 在进行字符串比较时,有时需要忽略大小写。toUpperCase()方法可以将两个字符串都转换为大写字母,然后进行比较。 Stringstr1="Hello";Stringstr2="hello";booleanisEqual=str1.toUpperCase().equals(str2.toUpperCase());...
public static String toCamelCase(String s) { if (s == null) { return null; } s = s.toLowerCase(); StringBuilder sb = new StringBuilder(s.length()); boolean upperCase = false; for (int i = 0; i < s.length(); i++) { char c = s.charAt(i); if (c == SEPARATOR) { up...
// Define a public class named Exercise30.publicclassExercise30{// Define the main method.publicstaticvoidmain(String[]args){// Declare and initialize a string variable.Stringstr="The Quick BroWn FoX!";// Convert the above string to all uppercase.Stringupper_str=str.toUpperCase();// Display...
// 定义两个 Function 对象进行相关转换操作 Function<String, String> upperCase = s -> s.toUpperCase(); Function<String, String> addPostfix = s -> s + "5"; // 链式调用,将 gta 这个字符串参数先传递 upperCase 这个函数进行操作,然后将得到的结果传递给 addPostfix 函数进行操作,得到返回结果 Stri...
1.publicclassA{publicStringgetString(){return"this is A"; }publicstaticvoidmain(String[] args){ A obj =newA();System.out.println(obj.getString()); } 输出结果是:A@279f23272.publicclassA{publicStringgetString(){return"this is A"; ...
string.toLowerCase(Locale locale) If you do not pass thelocaleparameter, the default locale,Locale.getDefault(), is used. To learn more, visitJava toLowerCase() With Locale. To convert all characters in a string to upper case characters, use theJava String toUpperCase() method....
例如:HELLO_WORLD->HelloWorld * * @param name 转换前的下划线大写方式命名的字符串 * @return 转换后的驼峰式命名的字符串 */ public static String convertToCamelCase(String name) { StringBuilder result = new StringBuilder(); // 快速检查 if (name == null || name.isEmpty()) { // 没必要转换...
Stringtext="Java is a powerful programming language";StringsearchTerm="java";if(text.toUpperCase().contains(searchTerm.toUpperCase())){System.out.println("Match found!");}else{System.out.println("Match not found.");} 4. Length of the Original and Uppercase Strings can be Unequal ...