test

public boolean check(String str) {
    int roundBracket = 0;
    int figureBracket = 0;
    int rectangleBracket = 0;

    if (str.isEmpty()) return true;

    char[] charArr = str.toCharArray();
    for (char currChar : charArr) {

        if (roundBracket < 0 || figureBracket <0 || rectangleBracket  <0) {
return false;
}

switch(currChar) {
    case “{” :
        figureBracket++;
        break;
    case “}” :
figureBracket--;
        break;
case “(” :
        roundBracket++;
        break;
case “)” :
        roundBracket--;
        break;
case “[” :
        rectangleBracket++;
        break;
case “]” :
        rectangleBracket--;
        break;
}

}

    if (roundBracket  != 0 || figureBracket != 0 || rectangleBracket  != 0) {
return false;
} else {
return true;
}
}