Typical industry search input requirements/ patterns

An object string property contains all possible values.
Now I want to filter the list with different kind of input patterns (aka single field search) In particular accepting wildcards (*,? & + etc escaping is fun in java.)
sample code:

String str="*+PATAC+*";
Pattern pat=Pattern.compile(".*\\+*\\+.*");

Matcher matcher=pat.matcher(str);
boolean flag=matcher.find(); // true;

Logger.println("1) matcher result->"+flag);
if ( flag == true)
Logger.println("pattern found"+str);

str = "adjkfh+PATAC+ajdskfhhk";

matcher=pat.matcher(str);
flag=matcher.find(); // true;

Logger.println("2) matcher result->"+flag);
if ( flag == true)
Logger.println("pattern found"+str);


str = "PATAC";

matcher=pat.matcher(str);
flag=matcher.find(); // true;

Logger.println("3) matcher result->"+flag);
if ( flag == true)
Logger.println("pattern found"+str);

str = "adjkfh+PATAC+";

matcher=pat.matcher(str);
flag=matcher.find(); // true;

Logger.println("4) matcher result->"+flag);
if ( flag == true)
Logger.println("pattern found"+str);

str = "+PATAC+testingsuffixchars";

matcher=pat.matcher(str);
flag=matcher.find(); // true;

Logger.println("5) matcher result->"+flag);
if ( flag == true)
Logger.println("pattern found"+str);