在 Java 中拆分逗號分隔字串的三種方法

// Example 1
public class UseIndexofAndSubString {
  public static void main(String[] args) {
    // Specified string to search comma from and then split it in a substring
    String java = "Java, is, a, fun, programming, language!";
    String comma = ","; // To search ',' from the first occurrence of the specified string
    // Our starting index is 0 since we do not want to miss any occurrence in the
    // given string value while the end index is also initialized
    int start = 0, end;
    // Now the indexOf will find the specified character which in this case is a
    // comma (,)
    // Note: The second parameter (start) determines that the method starts from the
    // beginning, otherwise it will
    // Basically, we will be able to locate the occurrence of (comma) from where we
    // want it to be split
    end = java.indexOf(comma, start);
    // If the loop does not find (comma)
    // We already mentioned the return type of indexOf in case if the given char
    // never occurred, right? That is what the loop searches for!
    while (end != -1) {
      //// Substring will give us each occurrence until the loop is unable to find
      //// comma
      String split = java.substring(start, end);
      System.out.println(split); // print each sub string from the given string
      // Then add 1 to the end index of the first occurrence (search more until the
      // condition is set false)
      start = end + 1;
      end = java.indexOf(comma, start);
    }
    // Since there is no comma after the last index of the string (language!), the
    // loop could not find the end index; thus, it never printed the last word!
    // We will get the last instance of the given string using substring and pass
    // start position (Starts from L and ends at the !)
    String split = java.substring(start);
    // Brave, you got it all right!
    System.out.println(split);
  }
}

Java
is
a
fun
programming
language!

String java = "Using$ another$ Character$ to$ split$ from!";
String sepFrom = "$"; // To search from the specified string

Using
another
Character
to
split
from!

List<String> ArraySting = Arrays.asList(IwillBeSplit.split(","));

// Example 3 using Lists' String with Split Method to Split String From a Given demarcation
import java.util.Arrays;
import java.util.List;

public class UseStingListWithSplitMthd {
  public static void main(String[] args) {
    String IwillBeSplit = "There,are,seven,days,!&#^*,in,a,weak";
    // List is an interface in Java
    List<String> ArraySting = Arrays.asList(IwillBeSplit.split(","));
    // Using for each loop
    ArraySting.forEach(System.out::println);
  }
}

There
are
seven
days
!&#^*
in
a
weak

String IwillBeSplit = "You%replaced%the%comma%with%a%percentage";
List<String> ArraySting = Arrays.asList(IwillBeSplit.split("%"));

You
replaced
the
comma
with
a
percentage

// Example 2 using ArrayLists and split method
import java.util.ArrayList;
import java.util.Arrays;

public class ArrayListSplitMethod {
  public static void main(String[] args) {
    String ALstr = "So,many,ways,to,separate,a,string,from,a,specified,position";

    ArrayList<String> Spliter = new ArrayList<>(Arrays.asList(ALstr.split(",")));
    Spliter.forEach(System.out::println);
  }
}

So
many
ways
to
separate
a
string
from
a
specified
position