public boolean equals(Object anObject) {
if (this == anObject) {
return true;
}
if (anObject instanceof String) {
String anotherString = (String)anObject;
int n = value.length;
if (n == anotherString.value.length) {
char v1[] = value;
char v2[] = anotherString.value;
int i = 0;
while (n-- != 0) {
if (v1[i] != v2[i])
return false;
i++;
}
return true;
}
}
return false;
/////上面这个是String类的equals方法的重写,第二个if先判断anObject是不是String的子类,但是下面 String anotherString = (String)anObject;这句话难道不是子类向父类强转吗?求大佬解惑
if (this == anObject) {
return true;
}
if (anObject instanceof String) {
String anotherString = (String)anObject;
int n = value.length;
if (n == anotherString.value.length) {
char v1[] = value;
char v2[] = anotherString.value;
int i = 0;
while (n-- != 0) {
if (v1[i] != v2[i])
return false;
i++;
}
return true;
}
}
return false;
/////上面这个是String类的equals方法的重写,第二个if先判断anObject是不是String的子类,但是下面 String anotherString = (String)anObject;这句话难道不是子类向父类强转吗?求大佬解惑