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Copy pathStack.java
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66 lines (56 loc) · 1.6 KB
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package Stack;
public class Stack {
private int[] datas;
private int tapIndex = -1;
private int lenght = 0;
public Stack(int lenght) {
this.lenght = lenght;
datas = new int[this.lenght];
}
public void push(int data) {
datas[++tapIndex] = data;
}
public int pop() {
return datas[tapIndex--];
}
public int peek() {
return datas[tapIndex];
}
public boolean isEmpty() {
return tapIndex == -1;
}
public boolean isFull() {
return tapIndex == (lenght - 1);
}
public static boolean checkBrackets(String string) {
char[] charString = string.toCharArray();
Stack stack = new Stack(10);
for (int i = 0; i < charString.length; i++) {
char c = charString[i];
if (c == '{' || c == '[' || c == '(') {
stack.push(c);
} else if (c == '}' || c == ']' || c == ')') {
char popElement = (char) stack.pop();
if ((popElement == '{' && c != '}')
|| (popElement == '[' && c != ']')
|| (popElement == '(' && c != ')')
) {
return false;
} else {
continue;
}
} else {
continue;
}
}
if (stack.isEmpty())
return true;
else {
return false;
}
}
public static void main(String args[]) {
String str = "{[1*2] +[2*3] + }";
System.out.println(Stack.checkBrackets(str));
}
}