通过调用substring(0, 1)方法,我们可以获取String的第一个字符。 下面是一个示例代码: Stringstr="Hello, World!";StringfirstChar=str.substring(0,1);System.out.println("The first character is: "+firstChar); 1. 2. 3. 使用toCharArray()方法 String类还提供了一个toCharArray()方法,用于将字符串转换...
publicclassMain{publicstaticvoidmain(String[]args){Stringstr="Hello World";charfirstChar=str.charAt(0);System.out.println("The first character is: "+firstChar);}} 1. 2. 3. 4. 5. 6. 7. 输出结果为: The first character is: H 1. 2. 取得字符串的第一个字符的步骤 可以用以下流程图来...
/* Found first character, now look at the rest of v2 */ if(i <= max) { intj=i +1; intend=j + targetCount -1; for(intk=targetOffset +1; j < end && source[j] == target[k]; j++, k++); if(j == end) { /* Found whole string. */ returni - sourceOffset; } } } ...
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:...
}/*Found first character, now look at the rest of v2*/if(i <=max) {intj = i + 1;intend = j + targetCount - 1;for(intk = targetOffset + 1; j < end && source[j] == target[k]; j++, k++) ;if(j ==end) {/*Found whole string.*/returni -sourceOffset; ...
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...
Java String、StringBuffer 和 StringBuilder 的区别 String String:字符串常量,字符串长度不可变。Java 中 String 是 immutable(不可变)的。 String 类的包含如下定义: /** The value is used for character storage. */privatefinalcharvalue[];/** The offset is the first index of the storage that is ...
[Android.Runtime.Register("first", "()C", "")] public char First (); Returns Char Implements First() Attributes RegisterAttribute Remarks Implements CharacterIterator.first() for String. Java documentation for java.text.StringCharacterIterator.first(). Portions of this page are modifications ...
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[]...
StringCharacterIterator.First Method Reference Feedback Definition Namespace: Java.Text Assembly: Mono.Android.dll Implements CharacterIterator. C# Copy [Android.Runtime.Register("first", "()C", "")] public char First (); Returns Char Implements First() Attributes RegisterAttribute Remarks...