equals()

public boolean equals(Object anObject) { //比较是否引用同一个对象 if (this == anObject) { return true; } //anObject 是否是String的实例对象 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; } }//anObject 是String的实例返回true return false; }