StringBuilder类 的substring(int start) 方法是一个内置的方法,用于返回一个从索引开始并延伸到该序列结束的子串。该方法返回的字符串包含从索引开始到旧序列结束的所有字符。语法public String substring(int start) Java Copy参数: 本方法只接受一个参数 start ,它是一个整数类型的值,指的是子串的起始索引。
classMain{publicstaticvoidmain(String[] args){ String str1 ="java is fun";// extract substring from index 0 to 3 System.out.println(str1.substring(0,4)); } }// Output: java substring() Syntax string.substring(intstartIndex,intendIndex) substring() Parameters Thesubstring()method can tak...
public String substring(int beginIndex) The substring() method returns a string that is a substring of this string. The substring begins with the character at the specified index and extends to the end of this string. Examples: "unhappy".substring(2) returns "happy" "Harbison".substring(3) ...
Returns a string that is a substring of this string. Substring(Int32) Returns a string that is a substring of this string. C# [Android.Runtime.Register("substring","(I)Ljava/lang/String;","")]publicstringSubstring(intbeginIndex);
Java String substring method is overloaded and has two variants. substring(int beginIndex): This method returns a new string that is a substring of this string. The substring begins with the character at the specified index and extends to the end of this string. ...
String substring(int startIndex) String substring(int startIndex,intendIndex) 13、concat() 连接两个字符串 14 、replace() 替换 : String replace(char original,char replacement) String s="Hello".replace('l','w'); String replace(CharSequence original,CharSequencereplacement) ...
publicclassStringPerformanceTest{publicstaticvoidmain(String[]args){Stringstr="Hello, World!";longstartTime=System.currentTimeMillis();for(inti=0;i<10000;i++){str.substring(1,5);}longendTime=System.currentTimeMillis();System.out.println("Substring method time: "+(endTime-startTime)+" ms")...
它有两种形式,第一种是:String substring(int startIndex) 第二种是:String substring(int startIndex,int endIndex) 13、concat() 连接两个字符串 14 、replace() 替换 它有两种形式,第一种形式用一个字符在调用字符串中所有出现某个字符的地方进行替换,形式如下: ...
1 //String类基本操作方法 2 public class StringBasicOpeMethod { 3 public static void main(String args[]){ 4 String str = "如何才能变得像棋哥一样优秀?算了吧,憋吹牛逼!"; //定义一个字符串 5 System.out.println(str); //输出字符串 ...
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...