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Create ValidParanthesis.java #155

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Create ValidParanthesis.java #155

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33 changes: 33 additions & 0 deletions ValidParanthesis.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
public boolean matching(char a, char b){
if(a == '(' && b ==')'){
return true;
}
else if(a == '{' && b == '}'){
return true;
}
else if(a == '[' && b== ']'){
return true;
}
else{
return false;
}
}
boolean ValidParanthesis(String x){
Deque<Character> s = new ArrayDeque<>();
for(int i = 0; i <x.length();i++){
char ch = x.charAt(i);
if(ch == '(' || ch == '{' || ch == '['){
s.push(ch);
}
else if(s.isEmpty() == true){
return false;
}
else if(matching(s.peek(),ch) == false){
return false;
}
else{
s.pop();
}
}
return (s.isEmpty() == true);
}