import java.util.*;
/*
*
* A string consists of parenthesis and letters. Write a program to validate all the parenthesis.
* Ignore the letters.eg.
* ((alf)ls) – valid
* )(dkk)() – invalid
*/
public class StringI_1 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter string :- ");
String str = sc.nextLine();
System.out.println("Entered string is :- " + str);
int countOpen = 0 ;
int countClose =0 ;
int sizeOfString = str.length();
if(str == null || sizeOfString == 0){
System.out.println("String is Empty");
System.exit(0);
}
if (str.charAt(0) != '(' && str.charAt(sizeOfString - 1) != ')' ){
System.out.println("First : Invalid String");
System.exit(0);
}
/*else
System.out.println("valid");*/
for(int i = 0 ; i< sizeOfString ; i++){
if(str.charAt(i) == '(' && i!=(sizeOfString-1) ){
if( str.charAt(i+1) == ')' ){
System.out.println("Second :Invalid String ");
System.exit(0);
}else{
countOpen++;
System.out.println("countOpen :- " + countOpen +" "+ str.charAt(i));
}
}else {
if(str.charAt(i) == ')' ){ //&& str.charAt(i+1) !=')'
countClose++;
System.out.println("countClose :- " + countClose +" "+ str.charAt(i));
}
}
}
if(countOpen == countClose){
System.out.println("Valid string");
}else{
System.out.println("Third : Invalid String");
}
}
}
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Below is the solution to validate the paranthesis :
ReplyDelete/* A string consists of parenthesis and letters. Write a program to validate all the parenthesis. Ignore the letters.
eg. ((alf)ls) – valid
)(dkk)() – invalid*/
package com.java.DemoPractice;
import java.util.HashMap;
import java.util.Map.Entry;
public class Test2 {
public static void main(String ar[])
{
HashMap hmap=new HashMap();
String str=")(dkk)()";
char[] ch=str.toCharArray();
for(char ch1:ch)
{
if(hmap.containsKey(ch1))
hmap.put(ch1, hmap.get(ch1)+1);
else
hmap.put(ch1, 1);
}
System.out.println(hmap);
Integer i = null,i1 = null;
for(Entry entry :hmap.entrySet())
{
if(entry.getKey()=='(' )
{
i=entry.getValue();
System.out.println(entry.getKey()+ " " +i);
}
if(entry.getKey()==')' )
{
i1=entry.getValue();
System.out.println(entry.getKey()+ " " +i1);
}
}
if(i==i1)
System.out.println("String is valid");
else
System.out.println("String is not valid");
}
}
package pratice;
ReplyDeletepublic class StringWithBracket {
public static void main(String[] args) {
// TODO Auto-generated method stub
checkBracketCount("()(dkk)()");
}
static void checkBracketCount(String s){
int[] letters = new int[128];
char[] charArray = s.toCharArray();
for(char c: charArray){
letters[c]++;
}
char openBracket = '(';
char closeBracket =')';
int openBracketCount = letters[openBracket];
int closeBracketCount = letters[closeBracket];
if(openBracketCount == closeBracketCount){
System.out.println("Valid String");
}
else{
System.out.println("Invalid String");
}
}
}