Find Whether String Contain Sequence Of Character Or Not

<b>
hello friend,
I am to the new java. I need to findout whether the string contain sequence of character or not. I tried like this
personLastName.length()> 0
It will return true even my string contains space. Is there any other method in java to find out ?
Thanks

There are a few ways to do that. Check out the String class or Regex for one that suits but
myString.indexOf(whatIWantToFindString)is an old favorite. It returns -1 if the sequence is not there, or the starting index if it is. The javadocs are your friends.
regards

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Moderator Message: FAQ. Thread locked.
Edited by: Suhas Saha on Nov 17, 2011 5:40 PM

There are a few ways to do that. Check out the String class or Regex for one that suits but
myString.indexOf(whatIWantToFindString)is an old favorite. It returns -1 if the sequence is not there, or the starting index if it is. The javadocs are your friends.
regards

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Message was edited by:
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Below you can see what I have made :
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Below you can see what I have made :
public class StringZerleger {
public static void main(String args[]) throws
Exception{
new StringZerleger().zerlegeString();
public void zerlegeString()
String s3 = "_a b c d";
String [] temp = null;
temp = s3.split(" ");
dump(temp);
public void istGueltigerBezeichner()
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public void dump(String []s)
System.out.println("------------");
for (int i = 0 ; i < s.length ; i++)
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unfortunately it doesn't work as I want it to work.
Could someone help me please ?
It shouldn't even compile.
This method
public void istGueltigerBezeichner()
String s3 = String s3;
boolean b = s3.regionMatches( 1, "_", 1, 1 );
}1) is never called,
2) should return a boolean
3) should accept the string you are testing as a parameter
4) should be redone using a different method of String
private boolean istGueltigerBezeichner(String str)
if(str == null)
return false;
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}Then call this method from with you loop, before your println statement
~Tim
Message was edited by:
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Find Whether String Contain Sequence Of Character Or Not

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