public static void main(String [] args){ String str = “abc,efg”; // 希望通过,将字符串分割成两个部分 // 方案一 String [] strs = str.split(“,”); System.out.println(strs[0] + " " + strs[1]); // 方案二 // 获取,的索引位置进行分割 // indexOf是从前往后第一个 lastIndex...
1. 字符串的基本概念 在Java中,字符串是由字符序列组成的不可变对象,使用String类表示。字符串一旦创建,其内容就不能被修改。如果需要修改字符串,实际上是创建了一个新的字符串对象。 2. substring方法 substring是String类的一个方法,用于截取字符串的一部分。它有两个重载版本: substring(int beginIndex):从begin...
publicclassSubstringExample{publicstaticvoidmain(String[]args){// 原始字符串Stringstr="Hello World!";// 指定字符chartarget='o';// 使用indexOf方法查找指定字符在字符串中的位置intindex=str.indexOf(target);// 使用substring方法截取指定字符之后的字符Stringresult=str.substring(index+1);// 打印指定字符...
In case the position needs to be dynamically calculated based on a character orStringwe can make use of theindexOfmethod: assertEquals("United States of America", text.substring(text.indexOf('(') +1, text.indexOf(')'))); A similar method that can help us locate our substring islastInd...
Windows10 eclipseV4.19 方法/步骤 1 创建一个测试工程,后缀为:.java,定义一个需要截取的字符串:tempStr,值为abcdefgi。2 截取字符串需要用到substring方法,测试输出,鼠标点击右键。3 截取方法需要有两个参数,第一个参数是起点位置,第二个参数为截止位置。4 截取之后可以在下方测试栏里查看结果。
To get a substring from a string in Java up until a certain character, you can use the indexOf method to find the index of the character and then use the substring method to extract the substring. Here is an example of how you can do this: String s = "Hello, world!"; char ...
publicstaticvoidmain(String[]args) { Stringtext="AABCCAAADCBBAADBBC"; Stringstr="AA"; intcount=StringUtils.countMatches(text,str); System.out.println(count); } } Download Code Output: 3 That’s all about finding the occurrences of a substring in a string in Java. ...
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String s = sc.nextLine(); System.out.println(s.substring(0, 2)); System.out.println(s.substring(2)); ...
1. String.substring() API The String.substring() in Java returns a new String that is a substring of the given string that begins from startIndex to an optional endIndex. These indices determine the substring position within the original string. The substring() method takes two arguments: beg...
在java中,substring是用来截取字符串,如果截取的长度超出了字符串的长度,就会报错: String str ="abcd"; str.substring(0,2);//返回:ab str.substring(0,5);//报错:Exception in thread "main" java.lang.StringIndexOutOfBoundsException: begin 0, end 5, length 4 ...