Java: single line substring

Question

I need to sub string the string after "2:" to the end of line as it is a changeable string:

Which mean in this example that I want to take the string "LOV_TYPE" from this 2 lines

ObjMgrSqlLog    Detail  4   2014-03-26 13:19:58 Bind variable 2: LOV_TYPE

ObjMgrSqlLog    Detail  4   2014-03-26 13:19:58 Bind variable 3: AUDIT_LEVEL

I tried to use subString(int startingIndex, int endingIndex) method, I can determine the first argument which is starting point.. but I can't determine the end point.

kabb · Accepted Answer · 2014-03-27 22:23:23Z

1

You can use two substrings, one that gets the String after 2:, and then one that gets the string before the next new line.

string = string.substring(string.indexOf("2:") + 2);
string = string.substring(0, string.indexOf("ObjMgrSqlLog));

If you need to get rid of the spaces on either end, you can then trim the string.

string = string.trim();

edited Mar 27, 2014 at 22:23

answered Mar 27, 2014 at 21:58

kabb

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2 Comments

fanta Over a year ago

unfortunately these two lines are output of another program .. so i can't detect the new line by using "\n" !

kabb Over a year ago

@fanta You could get the index of the next ObjMgrSqlLog, then.

villanueva.ricardo · Accepted Answer · 2014-03-27 22:00:28Z

1

source:

String str = "ObjMgrSqlLog    Detail  4   2014-03-26 13:19:58 Bind variable 2: LOV_TYPE";

You can use regex

String out1 = str.replaceAll("^.*?.\\:.*[ ]", "");

or classic index-of

int lastCh = str.lastIndexOf(":");
String out2 = str.substring(++lastCh).trim();

output:

System.out.println(out1);
System.out.println(out2);

edited Mar 27, 2014 at 22:00

answered Mar 27, 2014 at 21:49

villanueva.ricardo

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4 Comments

donfuxx Over a year ago

Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ ) Have you actually tried this code?

villanueva.ricardo Over a year ago

fixed! and I added other option.

donfuxx Over a year ago

now you forgot the 2nd param of replaceAll method ;-)

villanueva.ricardo Over a year ago

the first one is very simple, just the source and the pattern, but it is slow, the other one is faster.

RoverMAX · Accepted Answer · 2014-03-27 21:41:40Z

0

If you use str.substring(startingIndex), you will have the substring to the end of the string. It seems to be what you want. If you have extra spaces at the end of the string, you can always use a str.trim() to remove the spaces.

answered Mar 27, 2014 at 21:41

RoverMAX

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2 Comments

fanta Over a year ago

i need to sub string the word "LOV_TYPE" only .. not the whole sentence after "2:" .. and there is no spaces after this word "LOV_TYPE" .. only new line and new sentence

RoverMAX Over a year ago

@fanta if you have "\n" at the end of the string, you can substring from startingPosition to str.length() - 1. Then you will not have the last character

Noob · Accepted Answer · 2014-03-27 21:44:02Z

0

Use substring along with .length() to get the value of the length of the string. For example:

    String original = "ObjMgrSqlLog    Detail  4   2014-03-26 13:19:58 Bind variable 2: LOV_TYPE";
    String newString = original.substring (62, original.length ());
    System.out.print (newString);

answered Mar 27, 2014 at 21:44

Noob

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