Check if first CharSet has the same elements as second CharSet(equals): return true if two sets have the same exact elements; otherwise return false

Check if first CharSet is a subset of second CharSet(subset): return true if all elements of first set are in second set; otherwise return false

Check if first CharSet if a superset of second CharSet(superset) : return true if all elements of second set are in first set; otherwise return false

Clear all elements from the CharSet(clear): remove all elements

public class Charset {

private int asciiSet[] = new int [128];

public Charset() {

//by default all values in array are 0

}

public Charset(char c) {

insert(c);

}

public Charset(String str) {

for(int i=0;i < str.length();i++) {

insert(str.charAt(i));

}

}

public Charset union(Charset other)

{

Charset result = new Charset();

for(int i = 0; i < 128; i++)

{

if(asciiSet[i] == 1 || other.asciiSet[i] == 1)

result.asciiSet[i] = 1;

}

return result;

}

public Charset intersection(Charset other)

{

Charset result = new Charset();

for(int i = 0; i < 128; i++)

{

if(asciiSet[i] == 1 && other.asciiSet[i] == 1)

result.asciiSet[i] = 1;

}

return result;

}

public boolean insert(char c)

{

if(c >= 32 && c < 128)

{

asciiSet[c] = 1;

return true;

}

else

return false;

}

public boolean remove(char c)

{

if(c >= 32 && c < 128)

{

asciiSet[c] = 0;

return true;

}

else

return false;

}

public boolean isElement(char c)

{

if(c >= 32 && c < 128 && asciiSet[c] == 1)

{

return true;

}

else

return false;

}

public int size()

{

int total = 0;

for(int i = 0; i < 128; i++)

{

if(asciiSet[i] == 1)

total++;

}

return total;

}

public String toString()

{

String str = "{";

for(int c = 32; c < 128; c++)

{

if(asciiSet[c] == 1)

str += (char)c;

}

str += "}";

return str;

}

public Charset clone()

{

Charset copy = new Charset();

for(int i = 0; i < 128; i++)

copy.asciiSet[i] = asciiSet[i];

return copy;

}

/*

public void printSet() {

System.out.println("*******************");

System.out.println("Index:\tValue");

for(int i=0;i

System.out.println(i+"\t"+asciiSet[i]);

System.out.println("*******************");

}*/

public static void main(String[] args) {

Charset set1 = new Charset();

Charset set2= new Charset('A');

Charset set3 = new Charset("Laptop");

Charset set4 = new Charset("Monitor");

System.out.println("set1 : size = " + set1.size() + " " + set1);

System.out.println("set2 : size = " + set2.size() + " " + set2);

System.out.println("set3 : size = " + set3.size() + " " + set3);

System.out.println("set4 : size = " + set4.size() + " " + set4);

Charset union = set3.union(set4);

Charset inter = set4.intersection(set3);

System.out.println("Union of set3 and set 4 is " + union);

System.out.println("Intersection of set3 and set 4 is " + inter);

System.out.println("Removing 'M' from set4");

set4.remove('M');

System.out.println("set4: " + set4);

System.out.println("Inserting 'z' into set4");

set4.insert('z');

System.out.println("set4: " + set4);

System.out.println("Cloning set3 ");

Charset copyset3 = set3.clone();

System.out.println("Copy of set3 : " + copyset3);

}

}