11.13 Write a script that inputs several lines of text and a search character an
ID: 3764559 • Letter: 1
Question
11.13 Write a script that inputs several lines of text and a search character and uses String method indexOf to determine the number of occurrences of the character in the text.
Use this script to help:
public class AlphabetFrequencyString {
static int i,j,k,c=0,w;
static char m; //we can only define static for variables and fns not for arrays
public static void main(String[] args) {
System.out.println("Input string is : ");
System.out.println("Alive is awesome");
System.out.println("");
System.out.println("");
System.out.println("Output :");
frequencycount("Alive is awesome");
}
static void frequencycount(String s)
{
char[] z=new char[s.length()];
for(w=0;w<s.length();w++)
z[w]=s.charAt(w);
for(i=0;i<w;i++)
{
char ch=z[i];
for(j=i+1;j<w;j++)
{
if(z[j]==ch)
{
for(k=j;k<(w-1);k++)
z[k]=z[k+1];
w--;
j=i;
}
}
}
int[] t=new int[w];
for(i=0;i<w;i++)
{
for(j=0,c=0;j<s.length();j++)
{
if(z[i]==s.charAt(j))
c++;
}
t[i]=c ;
System.out.print(z[i]+"="+c+",");
}
}
}
Explanation / Answer
import java.util.Scanner;
/**
* @author srinu
*
*/
public class AlphabetFrequencyString {
/**
* @param args
*/
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
try {
String line = "";
String paragraph = "";
System.out.println("Enter the text: ");
do {
line = scanner.nextLine();
paragraph = paragraph + line + " ";
} while (!line.equals("exit"));
System.out.print("Enter the character to search: ");
char search = scanner.nextLine().charAt(0);
System.out.println("Output :");
int charOccur = frequencycount(paragraph, search);
System.out.println("Number of times Character Occured :"
+ charOccur);
} catch (Exception e) {
// TODO: handle exception
} finally {
scanner.close();
}
}
/**
* @param s
* @param search
* @return
*/
static int frequencycount(String s, char search)
{
int charOccur = 0;
for (int index = s.indexOf(search); index >= 0; index = s.indexOf(
search, index + 1)) {
charOccur++;
}
return charOccur;
}
}
OUTPUT:
Enter the text:
Alive is awesome
exit
Enter the character to search: e
Output :
Number of times Character Occured :4
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