madevelopers

String firstName;
String lastName;
int minute, hour;

firstName = "Mark Anthony";
lastName = "Degamo";
minute = 59;
hour = 12;

madevelopers

Java's reserved words includes: public, private, static, void and many more. See the full list here.

madevelopers

Use the + operator.

Example:

System.out.println("Hello" + " World");

madevelopers

The syntax for typecasting is to put the name of the type in parentheses and use it as an operator.

Example:

double pi = 3.14159;
int x = (int) pi;

madevelopers

Use the void keyword.

public static void doSomething() {
  // do something here
}

madevelopers

Declare the return type of the method. In this case we'll return the combined name which is a String.

public static String combineName(String firstName, String lastName) {
  return firstName + " " + lastName;
}

madevelopers

int[] nums = new int[]{1, 2, 3, 4, 5};
		
for (int i: nums) {
	System.out.println(i);
}

madevelopers

You can't. You need to keep track of the index.

int[] nums = new int[]{1, 2, 3, 4, 5};

int index = 0;
for (int i: nums) {
	System.out.println(index + ": " + i);			
	index++;
}

madevelopers

To compare Strings, we have to use the equals and compareTo methods. For example:

String name1 = "Alan Turing";
String name2 = "Ada Lovelace";

if (name1.equals (name2)) {
  System.out.println("The names are the same.");
}

madevelopers

Use Arrays.toString(arr) or Arrays.deepToString(arr) from java.util.Arrays.

int[] intArray = new int[] {1, 2, 3, 4, 5};
String[] strArray = new String[] {"John", "Mary", "Bob"};

System.out.println(Arrays.toString(intArray));
System.out.println(Arrays.toString(strArray));