private String convertString(String str, Boolean beginUp){ char[] ch = str.toCharArray(); StringBuffer sbf =new StringBuffer(); for(int i=0; i< ch.length; i++){ if(i ==0 && beginUp){//如果首字母需大写 sbf.append(charToUpperCase(ch[i])); }else{ sbf.append(charToLowerCase(ch...
Example: Java toLowerCase() classMain{publicstaticvoidmain(String[] args){ String str1 ="Learn Java"; String str2 ="Java123";// convert to lowercase letters System.out.println(str1.toLowerCase());// "learn java"System.out.println(str2.toLowerCase());// "java123" } } Run Code A...
";// Convert the above string to all lowercase.StringlowerStr=str.toLowerCase();// Display the original and lowercase strings for comparison.System.out.println("Original String: "+str);System.out.println("String in lowercase: "+lowerStr);}} Copy Sample Output: Original String: The Quick B...
toLowerCase()方法是String类方法,用于将给定的字符串转换为小写。 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. 在这里, String_...
1. 使用substring和toLowerCase方法 这种方法是最简单和常见的一种。它使用Java的内置方法substring和toLowerCase,将字符串的首字母取出并转换为小写,然后与剩余部分拼接在一起。下面是示例代码: publicclassFirstLetterToLower{publicstaticStringconvert(Stringinput){if(input==null||input.isEmpty()){returninput;}...
publicclassCaseConverter{publicstaticvoidmain(String[]args){Stringstr="Hello World";StringupperCaseStr=convertToUpperCase(str);// 调用自定义方法将字符串转换为大写StringlowerCaseStr=convertToLowerCase(str);// 调用自定义方法将字符串转换为小写System.out.println("大写字符串:"+upperCaseStr);System.out....
private String convertString(String str, Boolean beginUp){ char[] ch = str.toCharArray(); StringBuffer sbf =new StringBuffer(); for(int i=0; i< ch.length; i++){ if(i ==0 && beginUp){//如果首字母需大写 sbf.append(charToUpperCase(ch[i])); ...
Stringoriginal="Hello, World!";Stringlowercase=original.toLowerCase();System.out.println(lowercase);// Output: hello, world! As demonstrated above, thetoLowerCase()method efficiently converts all letters in the string to lowercase. 2.String.toLowerCase()with Custom Locale ...
Convert strings to lowercase using lambda expressionstringList.replaceAll(str->str.toLowerCase());// Print the list of lowercase stringsSystem.out.println("\nLowercase strings:");for(Stringstr:stringList){System.out.println(str);}// Convert strings to uppercase using lambda expressionstringList....
❮ 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 » ...