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Added another method to check valid parentheses in ValidParentheses.java #5616

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Merged
merged 2 commits into from
Oct 7, 2024
Merged

Added another method to check valid parentheses in ValidParentheses.java #5616

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97e8f11
added method in valid parentheses
TaranjeetSinghKalsi Oct 6, 2024
59951de
Merge branch 'master' into ValidParentheses
siriak Oct 7, 2024
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18 changes: 18 additions & 0 deletions src/main/java/com/thealgorithms/strings/ValidParentheses.java
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Original file line number Diff line number Diff line change
Expand Up @@ -38,4 +38,22 @@ public static boolean isValid(String s) {
}
return head == 0;
}
public static boolean isValidParentheses(String s) {
int i = -1;
char[] stack = new char[s.length()];
String openBrackets = "({[";
String closeBrackets = ")}]";
for (char ch : s.toCharArray()) {
if (openBrackets.indexOf(ch) != -1) {
stack[++i] = ch;
} else {
if (i >= 0 && openBrackets.indexOf(stack[i]) == closeBrackets.indexOf(ch)) {
i--;
} else {
return false;
}
}
}
return i == -1;
}
}
3 changes: 3 additions & 0 deletions src/test/java/com/thealgorithms/strings/ValidParenthesesTest.java
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Expand Up @@ -10,15 +10,18 @@ public class ValidParenthesesTest {
@Test
void testOne() {
assertTrue(ValidParentheses.isValid("()"));
assertTrue(ValidParentheses.isValidParentheses("()"));
}

@Test
void testTwo() {
assertTrue(ValidParentheses.isValid("()[]{}"));
assertTrue(ValidParentheses.isValidParentheses("()[]{}"));
}

@Test
void testThree() {
assertFalse(ValidParentheses.isValid("(]"));
assertFalse(ValidParentheses.isValidParentheses("(]"));
}
}