Java Reference
In-Depth Information
The first comparison yields false because the character at position 6 of
the main string is 'l' and the character at position 0 of the other string
is 'L' . The second comparison yields TRue because case is not signific-
ant. The third comparison yields false because the comparison length is
now 5 and the two strings are not the same over five characters, even
ignoring case.
In querying methods, such as regionMatches and those we mention next,
any invalid indexes simply cause false to be returned rather than throw-
ing exceptions. Passing a null argument when an object is expected
generates a NullPointerException .
You can do simple tests for the beginnings and ends of strings by using
startsWith and endsWith :
public boolean startsWith(String prefix, int start)
Returns true if this String starts (at start ) with the given pre-
fix .
public boolean startsWith(String prefix)
Equivalent to startsWith(prefix,0) .
public boolean endsWith(String suffix)
Returns TRue if this String ends with the given suffix .
13.2.3. String Literals, Equivalence and Interning
In general, using == to compare strings will give you the wrong results.
Consider the following code:
if (str == "¿Peña?")
answer(str);
 
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