Java Reference
In-Depth Information
Caution Avoidusingthestringconcatenationoperatorinalengthyloopbecauseit
results in the creation of many unnecessary StringBuilder and String objects.
The java.lang.System classprovidesaccesstosystem-orientedresources,includ-
ing standard input, standard output, and standard error.
System declares in , out ,and err classfieldsthatsupportstandardinput,standard
output, and standard error, respectively. The first field is of type , and the last two fields are of type . (I will formally introduce these classes in Chapter 8 .)
System also declares various static methods, including those methods that are
described in Table 4-6 .
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