Expand a given array

 Write A program to expand a given array

input-{‘A’,’3‘,‘B’,’2‘,’C’,’1‘}
 

output-{A,A,A,B,B,C}


public class CountArray {
char[] arr = new char[100];
int index = 0;

public static void main(String[] args) {
CountArray ca = new CountArray();
char[] brr = { ‘A’, ‘2’, ‘B’, ‘1’, ‘C’, ‘5’, ‘D’, ‘4’ ,’E’,’6′};
for (int j = 0; j < brr.length; j++) {
boolean flag = ca.getNumber(brr[j]);
if (!flag) {
int n = ca.getNum(brr[j + 1]);
ca.makeList(brr[j], n);
}
}

ca.print();

}

public void print() {
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i]);
}
}

public int getNum(char c) {

int zeroAscii = (int) ‘0’;
int charAscii = (int) c;
int num = (charAscii – zeroAscii);
return (num);
}

public void makeList(char ch, int n) {
int j = index;
for (int i = j; i < j + n; i++) {
arr[index++] = ch;
}
}

public boolean getNumber(char c) {

int zeroAscii = (int) ‘0’;
int charAscii = (int) c;
int num = (charAscii – zeroAscii);
return (num <= 9 && num >= 0);
}

}






Output:

A  A  B  C  C  C  C  C  D  D  D  D  E  E  E  E  E  E  

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