谁能找出这个Java程序的4个错误啊?

public class DNASequence {

private String sequence;

private int numberOfA;

private int numberOfT;

private int numberOfC;

private int numberOfG;

public static void main(String[] args) {

String s = "ATTATCGGGGTAA";
DNASequence dnaSequence = new DNASequence(s);

if ((dnaSequence.getNumberOfA() == 4)
&& (dnaSequence.getNumberOfT() == 4)
&& (dnaSequence.getNumberOfC() == 1)
&& (dnaSequence.getNumberOfG() == 4)) {
System.out.println("Test case 1: get methods passed\n");
} else {
System.out.println("Test case 1: get methods failed !!!\n");
}

if (dnaSequence.twoConsecutive('T')) {
System.out.println("Test case 2: method twoConsecutive passed\n");
} else {
System.out.println(
"Test case 2: method twoConsecutive failed !!!&

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