Java: What is the difference between final, finally, and finalize?

1final int MAX = 100;
2// MAX = 200; // COMPILE ERROR
3
4final List<String> list = new ArrayList<>();
5list.add("item");        // OK
6// list = new ArrayList<>(); // COMPILE ERROR

1class Parent {
2    final void lock() { System.out.println("Locked"); }
3}
4class Child extends Parent {
5    // void lock() { } // COMPILE ERROR
6}

1final class Immutable {
2    private final int val;
3    Immutable(int v) { val = v; }
4}
5// class Sub extends Immutable { } // COMPILE ERROR

1FileInputStream fis = null;
2try {
3    fis = new FileInputStream("data.txt");
4} catch (IOException e) {
5    System.err.println("Error");
6} finally {
7    if (fis != null) try { fis.close(); } catch (IOException e) { }
8}
9
10// Modern: try-with-resources
11try (FileInputStream fis2 = new FileInputStream("data.txt")) {
12    // use...
13} catch (IOException e) { }
14// fis2 auto-closed

1class Resource implements AutoCloseable {
2    @Override
3    public void close() {
4        System.out.println("Closed");
5    }
6}
7try (Resource r = new Resource()) {
8    // use...
9} // close() called