如何对Java扫描器使用多个定界符

Question

I am tryng to scan through an assembly file where the instruction and registers are separated by white space and commas. My delimiter is:

s.useDelimiter("\\s|\\,\\|\\(|\\)");

where I am trying to delimit whitespaces, commas, as well as open and close parentheses.

The input is:

addi $t0, $t0, 100
addi $a0, $a0,100

However even while scanning through I end up with test outputs like:

addi
$t0,
$t0,
100
addi
$a0,
$a0,100

It wont separate by commas for some reason. My desired output is:

addi
$t0
$t0
100
addi
$a0
$a0
100

I greatly appreciate your help!

Follow up for Samarth

sw$a0,4($a1)

should be:

sw
a0
4
a1

I have now found that I also need to delim by dollar signs, so for this example what should the delimiter be?

Answer 1

I tried using s.useDelimiter("\\\\s?\\\\$|\\\\s?,\\\\s?\\\\$?|\\\\s|\\\\(\\\\s?\\\\$?|\\\\s?\\\\)"); with this pattern I got output as

addi
t0
t0
100
addi
a0
a0
100

Hey if this is what you are looking for? If not please share any cases where you are not getting result as expected.

Find sample code here at https://ideone.com/0125ZV