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You are here: Home / How to parse this string in Java?

How to parse this string in Java?

October 8, 2021 by James Palmer

If you want to split the String at the / character, the String.split method will work:
For example:
String s = “prefix/dir1/dir2/dir3/dir4”;
String[] tokens = s.split(“/”);

for (String t : tokens)
System.out.println(t);

Output
prefix
dir1
dir2
dir3
dir4

Edit
Case with a / in the prefix, and we know what the prefix is:
String s = “slash/prefix/dir1/dir2/dir3/dir4”;

String prefix = “slash/prefix/”;
String noPrefixStr = s.substring(s.indexOf(prefix) + prefix.length());

String[] tokens = noPrefixStr.split(“/”);

for (String t : tokens)
System.out.println(t);

The substring without the prefix “slash/prefix/” is made by the substring method. That String is then run through split.
Output:
dir1
dir2
dir3
dir4

Edit again
If this String is actually dealing with file paths, using the File class is probably more preferable than using string manipulations. Classes like File which already take into account all the intricacies of dealing with file paths is going to be more robust.

…
String str = “bla!/bla/bla/”

String parts[] = str.split(“/”);

//To get fist “bla!”
String dir1 = parts[0];

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