String的equals

Question

public static void main(String[] args) {
String a="d";
char b='d';
System.out.println(a.equals(b));

}

这个输出的结果是什么，求付上理由

Answer 1

[code="java"] public boolean equals(Object anObject) {
if (this == anObject) {
return true;
}
if (anObject instanceof String) {
String anotherString = (String)anObject;
int n = count;
if (n == anotherString.count) {
char v1[] = value;
char v2[] = anotherString.value;
int i = offset;
int j = anotherString.offset;
while (n-- != 0) {
if (v1[i++] != v2[j++])
return false;
}
return true;
}
}
return false;
}[/code]
看JDK的源码，b传进来，anObject应该是个Character对象。==肯定不符合，anObject也不是String类的实现，那只能返回false了。