Question

Assume the only console output method available is display(c), as shown below, which you include in your solution. This means you are not permitted to use System.out.print(), System.out.println(), nor System.out.printf() in your methods. public static void display (charc) { System.out.print (c); Implement the following methods in a program class, that has a main() method that simply tests each. Apply the concept of overloading, where best, and that the methods can call other new methods to reduce repeating the same code. Part 1: Common output methods: display (String str) - displays all the characters in the String str displayin (String str) – displays all the characters in the String str, following by newline character ('\n') display (int val) - displays the integer in variable val display (double val) - displays the double in variable val displayin () - displays only a newline character Part 2: Special output methods: displayRepeat (String str, int rep) - displays the String str, repeated as many times indicated in variable rep displayTriangle(String str)) - displays all the characters in the String str, in a triangle form, ex; displayTriangle("pies") shows: р eee SSSS Part 3: Include the methods in your own utility class name the utility class whatever you want (Util, Special, or own name, such as: Yannitil move the methods your wrote into your utility class adjust your test program class to call the methods from your utility class Submission: include your solution, to the degree it is completed: as the single program file, or test program with utility class an output capture of running your test program

Answer 1

Using method overloading, we can use the same method name for multiple methods by changing the argument type and number of parameters.

1. display('c') invokes display(char c)
2. display("String") invokes display(String str)
3. display(5) invokes display(int val)
4. display(5.555) invokes display(double val)
5. diaplay("repeat", 5) invokes display(String str, int rep) and so on.

Program: Special.java

  public class Special{      public static void display(char c){             System.out.print(c);    }               public static void display(String str){                 for(int i=0;i<str.length();i++){                     display(str.charAt(i));                 }       }               public static void displayln(String str){               display(str);           display('\n');  }               public static void display(int val){            int rev = 0;            if(val == 0){                   display((char)48);              }               else{                   while(val!=0){                          rev = rev*10+val%10;                            val = val/10;                   }                       while(rev!=0){                          display((char) (48+(rev%10)));                          rev = rev/10;                   }               }       }               public static void display(double val){                 int int_part = (int)val;                double float_part = val - int_part;             display(int_part);              display('.');           int precision = 100000000;              int float_val = (int)(float_part*precision);            precision /= 10;                while(precision!=0){                    display((int)(float_val/precision));                    float_val = float_val%precision;                        precision /= 10;                }       }               public static void displayln(){                 display('\n');  }               public static void displayRepeat(String str, int rep){          for(int i=0;i<rep;i++){                      display(str);           }       }       public static void displayTriangle(String str){                 for(int i=0; i<str.length();i++){                    for(int j=0; j<=i;j++){                              display(str.charAt(i));                         }                       displayln();            }       }                       public static void main(String[] args){                 display('c');           displayln();            display("String");              displayln();            displayln("New Line string");           displayln();            displayRepeat("Repeat", 5);             displayln();            displayTriangle("triangle");            display(365);           displayln();            display(14.242);        } } /**************OUTPUT******************* c String New Line string RepeatRepeatRepeatRepeatRepeat t rr iii aaaa nnnnn gggggg lllllll eeeeeeee 365 14.24200000 ***************************************/

Screenshot:

public class Specialt public static void display (char c) { System.out.print(c); public static void display (String str) { for(int i=0;i<str.length();i++) { display (str.charAt(i)); public static void displayin(String str) { display (str); display('\n'); } public static void display(int val) { int rev = 0; if(val == 0){ display((char) 48); else { while (val!=0) { rev = rev*10+val810; val = val/10; } while (rev!=0) { display((char) (48+ (rev 10))); rev = rev/10; public static void display (double val) { int int_part = (int)val; double float_part - val - int_part; display(int_part); display('.'); int precision = 100000000; int float_val (int) (float_part*precision); precision /= 10; while (precision!=0) { display((int) (float_val/precision)); float_val float_val&precision; precision /= 10; } public static void displayin() { display('\n'); }

public static void displayRepeat (String str, int rep) { for(int i=0;i<rep;i++) { display (str); } public static void displayTriangle (String str) { for(int i=0; i<str.length(); i++) { for(int j=0; j<=i;j++) { display (str.charAt(i)); } displayln(); public static void main(String[] args) { display('c'); displayin(); display("String"); displayln(); displayin("New Line string"); displayin(); displayRepeat ("Repeat", 5); displayin(); displayTriangle("triangle"); display (365); displayin(); display (14.242); *OUTPUT String New Line string RepeatRepeatRepeatRepeatRepeat t rr iii aaaa nnnnn gggggg 1111 eeeeeeee 365 14.24200000 *******/

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