-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathValidParenthesis.java
More file actions
41 lines (35 loc) · 996 Bytes
/
Copy pathValidParenthesis.java
File metadata and controls
41 lines (35 loc) · 996 Bytes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
import java.util.*;
public class ValidParenthesis {
public static void main(String args[]){
String str = "(){}[";
System.out.println(isValid(str));
}
public static boolean isValid(String str){
Stack<Character> s = new Stack<>();
for(int i=0; i<str.length(); i++){
char ch = str.charAt(i);
if(ch == '(' || ch == '{' || ch == '['){//opening condition
s.push(ch);
}
else{ // closing
if(s.isEmpty()){
return false;
}
if((s.peek() == '(' && ch == ')')
|| (s.peek() == '{' && ch == '}')
|| (s.peek() == '[' && ch == ']')){
s.pop();
}
else{
return false;
}
}
}
if(s.isEmpty()){
return true;
}
else{
return false;
}
}
}