String类的equals是如何进行字符串比较的

public static void main(String[] args) {
        
        String a = new String("abc");
        String b = new String("abc");

        System.out.println(a==b);//结果为false
        System.out.println(a.equals(b));//结果为true
}

public final class String
implements java.io.Serializable, Comparable<String>, CharSequence {

private final char value[];

private int hash; // Default to 0

  public String(String original) {//我们通过new String("abc");把值放入value[]
    this.value = original.value;
    this.hash = original.hash;
  }

/**省略其他的代码**/

 public boolean equals(Object anObject) {
        if (this == anObject) {//如果两个值的引用相同，直接返回true
            return true;
        }
        if (anObject instanceof String) {//如果是String类型 
            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) {//把这两个数组里的内容逐个进行比较
                    if (v1[i] != v2[i])
                            return false;
                    i++;
                }
                return true;
            }
        }
        return false;
    }

/**省略其他的代码**/
}