String Manipulation · AP Computer Science A

AP Computer Science A Quiz

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USING OBJECTS AND METHODS

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Palindrome Checker: What will be the output if the string is "Java"?

public class PalTool {
    public static String check(String word) {
        word = word.replace(" ", "");
        String lower = word.toLowerCase();
        String ends = lower.substring(0, 1).toUpperCase() + lower.substring(lower.length() - 1);
        boolean isPal = true;
        for (int i = 0; i < lower.length() / 2; i++) {
            if (lower.charAt(i) != lower.charAt(lower.length() - 1 - i)) {
                isPal = false;
            }
        }
        return (isPal ? "PAL:" : "NOT:") + ends;
    }
}

// Test case: System.out.println(PalTool.check("Java"));

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