publicStringgetSubstring(String text,int start,int end){// 假设传入的end参数大于字符串的长度returntext.substring(start,end);// 这里可能会抛出StringIndexOutOfBoundsException}publicstaticvoidmain(String[]args){String result=get
异常信息示例:java.lang.StringIndexOutOfBoundsException: begin 0, end -1, length 0 这个异常一般发生在以下几种情况下: 当我们使用负数作为索引时,例如String str = "Hello"; char c = str.charAt(-1); 当我们使用大于等于字符串长度的索引时,例如String str = "Hello"; char c = str.charAt(10); ...
The first occurrence of'a'in the"Learn Java programming"string is at index 2. However, the index of second'a'is returned whenstr1.indexOf('a', 4)is used. It is because the search starts at index 4. The"Java"string is in the"Learn Java programming"string. However,str1.indexOf("Ja...
text/java (this.codePointAt(k) == ch) {@code &&} (k >= fromIndex) </blockquote> is true. In either case, if no such character occurs in this string at or after positionfromIndex, then-1is returned. There is no restriction on the value offromIndex. If it is negative, it has the...
public in indexOf(char ch, int fromIndex) 参数 ch - 一个字符。 fromIndex - 开始搜索的索引。 返回值 返回从 fromIndex 位置开始查找指定字符在字符串中第一次出现处的索引,如果此字符串中没有这样的字符,则返回 -1。 示例 public class Main { public static void main(String args[]) { String Str...
System.out.println(result);// -1// index of empty string in the stringresult = str1.indexOf(""); System.out.println(result);// 0} } 注意: 字符'a'在"Learn Java"字符串中出现多次。indexOf()方法返回'a'的第一次出现的索引(即 2)。
1.String.indexOf()API TheString.indexOf()in Java returns the index location of a specified character or string. TheindexOf()method is an overloaded method and accepts two arguments: substringorch: the substring that needs to be located in the current string. ...
在C语言中,String.indexOf函数并不存在。String类型和indexOf函数是Java中的概念。在C语言中,字符串通常是以字符数组或字符指针表示的。要在C语言中查找一个字符串中的子字符串,可以使用strstr函数。 strstr函数是C语言标准库string.h中的一个函数,它的原型如下: ...
Find the first occurrence of the letter "e" in a string, starting the search at position 5: publicclassMain{publicstaticvoidmain(String[]args){StringmyStr="Hello planet earth, you are a great planet.";System.out.println(myStr.indexOf("e",5));}} ...
The index of 'W' in the string is: 6 1. 示例2:从指定索引位置开始查找字符在字符串中的索引位置 Stringstr="Hello World";intindex=str.indexOf('o',5);System.out.println("The index of 'o' starting from index 5 is: "+index);