Question

public class Mystery {
  public static String mystery(String str, int input) {
    String result = "";
    for (int i = 0; i < str.length() - 1; i++) {
      if (input == 0) {
        str = "";
        result = str;
      }
      
      if (input == -2) {
        result = str.substring(2, 4);
      }
      
      if (input == 1) {
        result = str.substring(0, 1); 
      }
      
      if (input == 2) {
        result = str.substring(0, 2); 
      }
      
      if (input == 3) {
        result = str.substring(2, 3);
      }
      
      if (input == 4) {
        result = str.substring(3, 4);
      }
      
     
      
  
  
    }
    return result;
  }
}
Failed 1 tests. Here is one:
Testing mystery(String str = "test", int input = 8) failed:
Solution returned: "test"
Submission returned: ""

In a public class named Mystery, how do I write a static method that takes a String and an int value, and returns a string based on the int value.

These are some possible tests:

Testing mystery(String str = "GW", int input = -3) failed:
Solution returned: "GW"

Testing mystery(String str = "es", int input = -3) failed:
Solution returned: "es"

Testing mystery(String str = "nPdrLLS", int input = -4) failed:
Solution returned: "rLLS"

Testing mystery(String str = "ZoMEPS", int input = -3) failed:
Solution returned: "EPS"

Testing mystery(String str = "ULwFTrKGnp", int input = -6) failed:
Solution returned: "TrKGnp"

Answer 1

public class Mystery {
  public static String mystery(String str, int input) {
    String result = "";
    for (int i = 0; i < str.length() - 1; i++) {
      if (input == 0) {
        str = "";
        result = str;
      }
      
      if (input == -2) {
        result = str.substring(2, 4);
      }
      
      if (input == 1) {
        result = str.substring(1,str.length(); 
      }
      
      if (input == 2) {
        result = str.substring(2, str.length()); 
      }
      
      if (input == 3) {
        result = str.substring(2, 3);
      }
      
      if (input == 4) {
        result = str.substring(3, 4);
      }
      
     
      
  
  
    }
    return result;
  }
}