91影视

Declare a String array named `planets` and initialize it with the given strings. The code looks like this: ```java String[] planets = {"Mercury", "Venus", "Earth", "Mars"}; ```

Use a for-each loop to iterate through the elements of the `planets` array and display the contents of each element. The code for this step is as follows: ```java for (String planet : planets) { System.out.println(planet); } ```

Create a for loop to iterate through each element of the `planets` array, and use the `charAt` method of the String class to get and display the first character of each string. The code for this step is as follows: ```java for (String planet : planets) { System.out.println(planet.charAt(0)); } ``` Here's the full Java code solution integrating all three steps: ```java public class PlanetsArray { public static void main(String[] args) { // Step 1: Declare and initialize the String array String[] planets = {"Mercury", "Venus", "Earth", "Mars"}; // Step 2: Display the contents of each element in the array for (String planet : planets) { System.out.println(planet); } // Step 3: Display the first character of each string in the array for (String planet : planets) { System.out.println(planet.charAt(0)); } } } ```