String the String, converted to uppercase. Attributes RegisterAttribute Remarks 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 pro...
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(); System.out.println("Java String to Upper Case: " + strUpperCase); readUserInputAndPr...
erDiagram STRING { String str } STRING ||--|| UPPER_CASE_METHOD : toUpperCase() STRING { String upperCaseStr } 在上面的ER图中,STRING表示字符串对象,包含原始字符串str和转化后的大写字符串upperCaseStr。UPPER_CASE_METHOD则表示将字符串转化为大写字母的方法。 总结 通过本文的介绍和示例代码,读者应该...
public static void main(String[] args) { String dd="uppercase"; String large=dd.toUpperCase(); System.out.println(large); } } 1. 2. 3. 4. 5. 6. 7. 效果: String toLowerCase():字符串全部转成小写 代码如下: public class Test { public static void main(String[] args) { S...
如果首字符大写,返回true,否则返回false private boolean isUppercase(String str) { // TODO Auto-generated method stub char c = str.charAt(0); return Character.isUpperCase(c); } 当然,还可以用 char c = str.charAt(i); if (!Character.isLowerCase(c)) ...
1.String.toUpperCase()Method ThetoUpperCase()method is an overloaded method. It takes an optional argument of typeLocale. WhenLocaleinformation is passed, the method returns a newStringafter converting all the alphabetic characters to uppercase according to the specifiedLocalerules. ...
// 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...
Read more: Java String | String.charAt(index) Method with Example 阅读更多: Java String | 带示例的String.charAt(index)方法 5)s1.indexOf(s2) (5) s1.indexOf(s2)) This function is used to get the starting index of any substring. Here, if substring s2 exists in the string s1, it will...
是这样说的 The toString method for class Object return a string consisting of the name of the class of which theobject is an instance, the at-sign character `@’, andthe unsigned hexadecimal representation of the hash code of theobject. In other words, this method returns a string equal ...
是这样说的 The toString method for class Object return a string consisting of the name of the class of which theobject is an instance, the at-sign character `@', andthe unsigned hexadecimal representation of the hash code of theobject. In other words, this method returns a string equal to...