publicclassFindCharacterInString{publicstaticvoidmain(String[]args){Stringstr="Hello, World!";// 定义字符串charch='o';// 定义要查找的字符intindex=str.indexOf(ch);// 使用indexOf()查找字符if(index!=-1){System.out.println("字符 '"+ch+"' 在字符串中的位置是:"+index);}else{System.out....
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[]...
Write a Java program to find the index of the first unique character in a given string. Assume that there is at least one unique character in the string. Pictorial Presentation: Sample Solution: Java Code: importjava.util.*;publicclassSolution{publicstaticvoidmain(String[]args){// Test the ...
We can also find the duplicate characters and their count of occurrences in this string. Map<Character,Integer>duplicateCharsWithCount=bag.entrySet().stream().filter(e->bag.get(e.getKey())>1).collect(Collectors.toMap(p->p.getKey(),p->p.getValue()));System.out.println(duplicateCharsWithCo...
publicstaticintfindCharacter(Stringstr,chartarget){intcount=0;intposition=-1;// 初始化字符出现的位置for(inti=0;i<str.length();i++){charcurrentChar=str.charAt(i);if(currentChar==target){count++;position=i;// 更新字符出现的位置}}returnposition;// 返回字符出现的位置} ...
* Find all duplicate characters in a String and print each of them. */ public static void printDuplicateCharacters(String word) { char[] characters = word.toCharArray(); // build HashMap with character and number of times they appear in String ...
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0. s = "loveleetcode", return 2. 解题思路: 开个26个数的数组,然后先对字符串过一遍,统计每个字母出现的次数,然后从头再国一遍,第一个...
1 import java.util.HashMap; 2 import java.util.Map; 3 import java.util.Set; 4 5 public class findMulString { 6 7 /** 8 * @param args 9 */10 public sta
String url="jdbc:xxxx://xxxx:xxxx/xxxx";Connection conn=DriverManager.getConnection(url,username,password);... 这里并没有涉及到spi的使用,接着看下面的解析。 源码实现 上面的使用方法,就是我们普通的连接数据库的代码,并没有涉及到SPI的东西,但是有一点我们可以确定的是,我们没有写有关具体驱动的硬编码Cl...
public static void main(String[] arg) { String str1 = "India is not a bad country"; String str2 = "Isgt"; String result = ""; String str2Lower = str2.toLowerCase(); for (int i = 0; i < str1.length(); i++) { char value1 = Character.toLowerCase(str1.charAt(i)); if...