Exploring System
The java.lang.System utility class declares class methods that provide access to the current time (in milliseconds), system property values, environment variable values, and other kinds of system information. Furthermore, it declares class methods that support the system tasks of copying one array to another array, requesting garbage collection, and so on.
Table 7-7 describes some of System’s methods.
Table 7-7. System Methods
Method |
Description |
|---|---|
void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) |
Copies the number of elements specified by length from the src array starting at zero-based offset srcPos into the dest array starting at zero-based offset destPos. This method throws NullPointerException ... |
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