下面是完整的代码示例,演示了如何实现Java string截取第一位字符的功能: publicclassStringUtils{publicstaticStringgetFirstCharacter(Stringstr){charfirstChar=str.charAt(0);StringfirstCharStr=String.valueOf(firstChar);returnfirstCharStr;}publicstaticvoidmain(String[]args){Stringstr="Hello World";StringfirstChar...
publicclassStringFirstCharacter{publicstaticvoidmain(String[]args){Stringinput="Hello, World!";charfirstChar=getFirstCharacter(input);if(firstChar!='\0'){// '\0'用于表示获取失败System.out.println("字符串的第一个字符是: "+firstChar);}else{System.out.println("输入的字符串为空。");}}publics...
如果不存在,则返回 -1 。 示例1: 输入: s = "leetcode" 输出: 0 示例2: 输入: s = "loveleetcode" 输出: 2 示例3: 输入: s = "aabb" 输出: -1 提示: 1 <= s.length <= 105 s 只包含小写字母 来源:力扣(LeetCode) 链接:https://leetcode.cn/problems/first-unique-character-in-a-stri...
String strb1 = String.valueOf(bool); //将布尔类型转换为字符串类型 String stri1 = String.valueOf(integer); //将整形转换为字符串类型 String strl1 = String.valueOf(LongInt); //将长整型转换为字符串类型 String strf1 = String.valueOf(f); //将单精度浮点型转换为字符串类型 String strd1 =...
util.*; public class CharacterIteratorDemo { public static void main(String[] args) { CharacterIterator characterIterator = new StringCharacterIterator( "GeeksForGeeks"); System.out.println("First character: " + characterIterator .first()); } } Java Copy输出:...
importjava.util.*;publicclassSolution{publicstaticvoidmain(String[]args){// Test the first_Uniq_Char function and print the resultStrings="wresource";System.out.println("Original String: "+s);System.out.println("First unique character of the above: "+first_Uniq_Char(s));}publicstaticintfirs...
[Android.Runtime.Register("getChars","(II[CI)V","")]publicvoidGetChars(intsrcBegin,intsrcEnd,char[]? dst,intdstBegin); Parameters srcBegin Int32 index of the first character in the string to copy. srcEnd Int32 index after the last character in the string to copy. ...
Write a Java program to find the first non-repeating character in a string. Visual Presentation: Sample Solution: Java Code: // Importing necessary Java utilities.importjava.util.*;// Define a class named Main.publicclassMain{// Main method to execute the program.publicstaticvoidmain(String[]...
io.Serializable, Comparable<String>, CharSequence { /** The value is used for character stor...
implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character storage. */ private final char value[]; /** The offset is the first index of the storage that is used. */ private final int offset; ...