• Return the mininum of the three numbers.
  Write one version using Math.min and another version using if statements.
  [See Self-Check Problem 16 in Chapter 3.]
• Return the median of the three numbers.
• Return true if all three numbers are equal to each other.
• Return true if all three numbers are different from each other.
• Return true if two of the three numbers are negative.

import java.util.*;
public class StringAgain {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        System.out.print("Enter the first string:");
        String first = console.next();
        String next = "";  // priming the loop
        while (! first.equals(next)) {
            System.out.print("Enter the next string:");
            next = console.next();
        }
    }
}

• Write a Java program that inputs Strings from the user until the user enters a different String.
• Write a Java program that inputs Strings from the user until the user enters a String that contains a 'z'.
• Write a Java program that inputs Strings from the user until the user enters the same String twice in a row.

• Return the sum of the array.
  Answer:
  

  public static double sumArray(double[] list) {  
      double sum = 0;
      for (int i = 0; i < list.length; i++) {
          sum += list[i];
      }
      return sum;
  }
  

  
  
• Return the maximum element of the array.  [See Self-Check Problem 10 in Chapter 7.]
• Increment every element in the array.  [See p. 454 and p. 477.]
• Replace negative elements with zeroes.
• Return the number of elements that are negative.
• Return true if every element is negative.
  Answer:
  

  public static boolean allNegative(double[] data) {   
      int count = 0;
      for (int i = 0; i < data.length; i++) {
          if (data[i] < 0) {
             count++;
          }
      }
      return (count == data.length);
  }
  

  
  This code serves as a hint for the previous and next tasks in this list.
• Return true if most of the elements are negative.