jnizet

// Annotation1.java

package bar.baz;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)

jnizet

package bar.baz;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.JFrame;
import javax.swing.JLabel;

jnizet

public class ButtonTest {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    showGUI();
                }
            }
        );
    }

jnizet

    public static BigInteger fact(int a) {
        if (a == 0) {
            return BigInteger.ONE;
        }
        return BigInteger.valueOf(a).multiply(fact(a - 1));
    }

jnizet

import java.util.ArrayList;
import java.util.List;

public class GenericsFun {
    public static void main(String[] args) {
        List<B> bs = new ArrayList<>();
        bs.add(new B());
        List<? extends A> mix = bs;
        appendFirstElementToList(mix);
        System.out.println("mix.size() = " + mix.size());

jnizet

import java.util.Arrays;

public class ArrayTest { 
    public static void main(String[] args) {
        int[] array = new int[] {1, 2, 3, 4};
        foo(array);
        System.out.println("array in main : " + Arrays.toString(array));
    }
    
    private static void foo(int[] array) {

jnizet

@Override
public boolean login(User user) {
    // Check if we have a valid user/pass pair
    String hashedPassword = hash(user.getPassword());
    String jpql = "SELECT u FROM User u WHERE u.username=:userName AND u.password=:password";
    TypedQuery<User> query = entityManager.createQuery(jpql, User.class);
    query.setParameter("userName", user.getUsername());
    query.setParameter("password", hash);
    List<User> users = query.getResultList();
    return !users.isEmpty();

jnizet

        try {
            bar.libraryCall("hello", 1);
            int i = 1;
            if (i < 0) {
                throw new NoSuchMethodError();
            }
        }
        catch (NoSuchMethodError e) {
            bar.libraryCall("hello");
        }

jnizet

package com.foo;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;

public class SynchronizedCollectionIteration {
    public static void main(String[] args) {
        final CountDownLatch latch = new CountDownLatch(1);

jnizet

package com.foo;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;

public class UnsynchronizedCollectionAccess {
    public static void main(String[] args) throws InterruptedException {
        final CountDownLatch latch = new CountDownLatch(1);
        final List<Integer> list = new ArrayList<Integer>();