Java Reference
In-Depth Information
Invoke the
System
class's
getProperty
method. For example:
String path = System.getProperty("user.dir");
How It Works
When a Java program starts, the JRE updates the
user.dir
system property to record
where the JRE was invoked. The solution example passes the property name
"user.dir"
to the
getProperty
method, which returns the value.
8-6. Copying a File
Problem
You need to copy a file from one folder to another.
Solution
From the default
FileSystem
, you create the “to” and “from” paths where the files/
folders exist and then use the
Files.copy static
method to copy files between
the created paths:
FileSystem fileSystem = FileSystems.getDefault();
Path sourcePath = fileSystem.getPath("file.log");
Path targetPath = fileSystem.getPath("file2.log");
System.out.println("Copy from
"+sourcePath.toAbsolutePath().toString()+
" to "+targetPath.toAbsolutePath().toString());
try {
Files.copy(sourcePath, targetPath,
StandardCopyOption.REPLACE_EXISTING);
} catch (IOException e) {
e.printStackTrace();
}
