* Returns a new string that is a substring of this string. * The substring begins at the specified `beginIndex` and extends to the character at index `endIndex - 1`. * Thus the length of the substring is `endIn
Stringstr="Hello World";// 使用charAt()方法获取指定位置字符charchar1=str.charAt(4);System.out.println("Character at index 4: "+char1);// Output: o// 使用getChars()方法将指定范围字符复制到目标字符数组中char[]charArray=newchar[5];str.getChars(6,11,charArray,0);System.out.println("Ch...
Stringstr="Hello, World! Welcome to Java.";intindex=str.indexOf("World",7);// 从索引7开始查找System.out.println("Found at index: "+ index);// 输出: Found at index: 7 3.lastIndexOf(String str) 返回指定子字符串str在此字符串中最后一次出现处的索引,如果未找到则返回-1。 复制代码 Stri...
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"main" java.lang.StringIndexOutOfBoundsException: String index out of range: 1at java.lang.String.charAt(String.java:658)at java.util.regex.Matcher.appendReplacement(Matcher.java:762)at java.util.regex.Matcher.replaceAll(Matcher.java:906)at java.lang.String.replaceAll(String.java:2162)at com...
indexOf(String str)获取字符串中首次出现的位置索引位置num.indexOf(“H”)结果为0(注意字符串的下标索引是以0开始的) lastIndexOf(String str)获取字符串中最后一次次出现的位置索引位置num.lastIndexOf("o")结果为4 charAt(int index)获取指定索引位置的字符num.charAt(1) 结果为e ...
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"Java"string is in the"Learn Java programming"string. However,str1.indexOf("Java", 8)returns -1 (string not found). It is because the search starts at index 8 and there is no"Java"in"va programming". Also Read: Java String lastIndexOf()...
(21); char i=test.charAt(-1); System.out.println(i); } } 异常信息 20 Exception in thread "main..." java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.charAt...个人总结: 如果程序中出现StringIndexOutOfBoundsException,表示程序尝试获取大于等于字符...
startIndex- the beginning index endIndex(optional) - the ending index substring() Return Value Thesubstring()method returns a substring from the given string. The substring begins with the character at thestartIndexand extends to the character at indexendIndex - 1 ...