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
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 ...
最后,返回字符在字符串中最后一次出现的位置。 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;/...
We can use the given code tofind repeated charactersor modify the code tofind non-repeated characters in the string. 1. Using Plain Java Let us start with writing the program logic ourselves. In this solution, we are creatingMapwhere each unique character in the string is theMapkey, and ...
* 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 ...
Class Path Wild Cards Class path entries can contain the base name wildcard character (), which is considered equivalent to specifying a list of all of the files in the directory with the extension .jar or .JAR. For example, the class path entry mydir/specifies all JAR files in the dire...
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...
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...
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