Brief Introduction to Java String Split "simple introduction to Java string Split"

Split is a common function in Java. It split a full string to an array based on Delimeter.

For example, Split ' A:b:c ' with ': ' results in [A, B, c]

In some scenario, it's better to keep the delimeter instead for discard it while splitting.

Here is some strategies.

Split is a common function in Java that splits the entire string into arrays based on delimiters.

For example "A:b:c" through the ":" section to get the array [A, B, c]

However, under certain scenarios, we might want to keep the delimiter

Here are some ways to preserve separators

System.out.println (arrays.tostring ("A:b:c". Split (":"));  Normal split
[A, B, c]
System.out.println (arrays.tostring ("A:b:c". Split ("(=:)"));  Look behind
[A,: B,: c]
System.out.println (arrays.tostring ("A::b:c". Split ("(=:)"));  Look behind
[A,:,: B,: c]
System.out.println (arrays.tostring ("A:b:c". Split ("(? <=:)"));  Look ahead
[A:, B:, C]
System.out.println ("A:b:c". Split ("(?!:)")));   Look ahead
[A:, B:, C]
System.out.println (arrays.tostring ("A:b:::c". Split ("?! =:)")));  Look Bothway
[A,:, B,:,:,:, C]
System.out.println (arrays.tostring ("A:b:::c". Split ("(? <=:) | (? =:)")));  Look Bothway
[A,:, B,:,:,:, C]

Look ahead forward binding

Delimeter'll be attached to the previous string

The delimiter is appended to the forward string

Look behind back to union

Delimeter'll be attached to the subsequent string

The delimiter is appended to the forward string

Look Bothway completely detached

Similar to normal split, but every delimeter'll be is included in the array

Similar to normal segmentation, but each delimiter also appears in the array

Some Interesting usage

Some interesting usage.

System.out.println (arrays.tostring ("1A2BB3CCC". Split ("(? <=[a-z])" (? =[0-9])));  Digit + [a-z]characters
[1a, 2BB, 3CCC]
System.out.println (arrays.tostring ("1_1112_222aditional3_333". Split ("(? <=_.)"));  "_" with 2 more chars
[1_11, 12_22, 2aditional3_33, 3]
System.out.println (arrays.tostring ("1_1112_222aditional3_3333". Split ("(? <=_.{ 3}));  "_" with 3 more chars
[1_111, 2_222, aditional3_333, 3]
System.out.println (arrays.tostring ("1_1112_222aditional3_33". Split ("(? <=_.{ 3}));  "_" with 3 more chars
[1_111, 2_222, aditional3_33]

Brief Introduction to Java String Split "simple introduction to Java string Split"