I have string
String path = /mnt/sdcard/Album/album3_137213136.jpg
I want to only strings album3.
How can I get that substring.
I am using substring through index.
Is there any other way because album number is getting changed because it will fail in like album9, album10.
You can use a regular expression, but it seems like using index is the simplest in this case:
int start = path.lastIndexOf('/') + 1;
int end = path.lastIndexOf('_');
String album = path.substring(start, end);
You might want to throw in some error checking in case the formatting assumptions are violated.
Try this
public static void main(String args[]) {
String path = "/mnt/sdcard/Album/album3_137213136.jpg";
String[] subString=path.split("/");
for(String i:subString){
if(i.contains("album")){
System.out.println(i.split("_")[0]);
}
}
}
Obligatory regex solution using String.replaceAll:
String album = path.replaceAll(".*(album\\d+)_.*", "$1");
Use of it:
String path = "/mnt/sdcard/Album/album3_137213136.jpg";
String album = path.replaceAll(".*(album\\d+)_.*", "$1");
System.out.println(album); // prints "album3"
path = "/mnt/sdcard/Album/album21_137213136.jpg";
album = path.replaceAll(".*(album\\d+)_.*", "$1");
System.out.println(album); // prints "album21"
Using Paths:
final String s = Paths.get("/mnt/sdcard/Album/album3_137213136.jpg")
.getFileName().toString();
s.subString(0, s.indexOf('_'));
If you don't have Java 7, you have to resort to File:
final String s = new File("/mnt/sdcard/Album/album3_137213136.jpg").getName();
s.subString(0, s.indexOf('_'));
Use regex to match the substring
path.matches(".*album[0-9]+.*")
Try this ..
String path = /mnt/sdcard/Album/album3_137213136.jpg
path = path.subString(path.lastIndexOf("/")+1,path.indexOf("_"));
System.out.println(path);
At line no 8 we have to used for loop another optional case replace for loop using just while loop like as while(true){. . .}
public class SubString {
public static void main(String[] args) {
int count = 0 ;
String string = "hidaya: swap the Ga of Gates with the hidaya: of Bill to make Bites."
+ " The hidaya: of Bill will then be swapped hidaya: with the Ga of Gates to make Gall."
+ " The new hidaya: printed out would be Gall Bites";
for (int i = 0; i < string.length(); i++)
{
int found = string.indexOf("hidaya:", i);//System.out.println(found);
if (found == -1) break;
int start = found + 5;// start of actual name
int end = string.indexOf(":", start);// System.out.println(end);
String subString = string.substring(start, end); //System.out.println(subString);
if(subString != null)
count++;
i = end + 1; //advance i to start the next iteration
}
System.out.println("In given String hidaya Occurred "+count+" time ");
}
}
Regular expressions?