Java Basics

basics.java

// int Array initialization
int[] intArray = {1,2,3};

// String Array initialization
String[] stringArray = {"a","b","c"};

// Load resources class
File file = new File(getClass().getClassLoader().getResource(jobFileName).getFile());

// Best datatype for saving date & time - Java 8
java.time.Instant;

// Comparable over multiple String attributes
class Car implements Comparable<Car> {
    int year;
    String make, model;
    public int compareTo(Car other) {
        if (!this.make.equalsIgnoreCase(other.make))
            return this.make.compareToIgnoreCase(other.make);
        if (!this.model.equalsIgnoreCase(other.model))
            return this.model.compareToIgnoreCase(other.model);
        return this.year - other.year;
    }
}

// Generate UUID (universally unique identifier), random number
UUID.randomUUID().toString()