2,306
edits
Changes
Jump to navigation
Jump to search
mLine 3:
Line 3: − sudo apt-get update+ − sudo apt-get install oracle-java8-installer</nowiki>+ Line 792:
Line 792: − + Line 887:
Line 887: + + + + + + + + + + + + + + + + + + + + + + + + +
→Reading files with FileReader
===With apt===
===With apt===
<nowiki>sudo apt-add-repository ppa:webupd8team/java
<nowiki>sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer</nowiki>
Also ensure your JAVA_HOME variable has been set to:
Also ensure your JAVA_HOME variable has been set to:
See: [https://github.com/rafahsolis/javaTutorial/blob/master/ReadTextFile.java ReadTextFile.java]
See: [https://github.com/rafahsolis/javaTutorial/blob/master/ReadTextFile.java ReadTextFile.java]
=== List files in dir ===
===List files in dir===
<syntaxhighlight lang="java">
<syntaxhighlight lang="java">
import java.io.IOException;
import java.io.IOException;
}</source>
}</source>
=== with nio ===
<syntaxhighlight lang="java">
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
public class FileReadRunner {
public static void main(String[] args) throws IOException {
Path pathFileToRead = Paths.get("./resources/data.txt");
List<String> lines= Files.readAllLines(pathFileToRead);
System.out.println(lines);
}
}
public class FileReadLineByLineRunner {
public static void main(String[] args) throws IOException {
Path pathFileToRead = Paths.get("./resources/data.txt");
Files.lines(pathFileToRead).forEach(System.out::println);
Files.lines(pathFileToRead).map(String::toLowerCase).forEach(System.out::println);
Files.lines(pathFileToRead).map(String::toLowerCase).filter(str -> str.contains("a")).forEach(System.out::println);
}
}
</syntaxhighlight><br />
===Writing files===
===Writing files===
<source lang="java">
<source lang="java">