enhanced for loop java 2d array

enhanced for loop java 2d array

Now, let's dive into enhanced for loops and 2D arrays in Java!

A traditional for loop in Java looks like this:

for (int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}

This loop iterates over each element of a 1D array arr. However, when dealing with 2D arrays, you might want to use an enhanced for loop to simplify the process.

An enhanced for loop in Java is denoted by the keyword for followed by parentheses containing the following elements:

Here's how you can use it to iterate over a 2D array:

int[][] arr = {
{1, 2, 3},
{4, 5, 6},
{7, 8, 9}
};
for (int[] row : arr) {
for (int val : row) {
System.out.print(val + " ");
}
System.out.println();
}

In this example:

By using enhanced for loops, you can avoid explicit indexing and focus on the logic of your code. This syntax is particularly useful when working with multidimensional arrays or collections.

Enhanced for loop java example

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Here's an enhanced For Loop example in Java:

import java.util.Arrays;
public class EnhancedForLoopExample {
public static void main(String[] args) {
// Create a string array
String[] colors = {"Red", "Green", "Blue", "Yellow", "Purple"};
// Print each color using enhanced for loop
for (String color : colors) {
System.out.println("The color is: " + color);
}
// Sort the array of strings in descending order
Arrays.sort(colors, 0, colors.length);
System.out.println("Sorted colors in descending order:");
for (String color : colors) {
System.out.println(color);
}
}
}

When you run this code, it will print each string in the colors array followed by "The color is: " and then the actual value of the color. Then, it sorts the array in descending order using the Arrays.sort() method and prints out each sorted color.

Enhanced for loop (also known as foreach loop) was introduced in Java 5 (Java 1.5). It's used to iterate over an array or a collection without explicitly knowing its size. This makes the code more readable and easier to maintain.

Here's how it works:

In this example, we're using an enhanced for loop to iterate over a string array. We're also using the same loop to print out the sorted colors in descending order after sorting them.

Overall, enhanced for loops can make your code more concise and readable by simplifying iteration logic.