java - String equalsIgnoreCase() 与 JDK 7 Objects.equals(Object, Object)

Question

通过替换以下内容，我是否会丢失任何东西:

    public final boolean testEquals(String left, String right) {
        if ((left == null && right != null) || (left != null && right == null)) {
            return false;
        } else if (left == null && right == null) {
            return true;
        } else {
            return left.equalsIgnoreCase(right);
        }
    }

来自 JDK 7 Objects class :

    public final boolean testEquals(String left, String right) {
        return Objects.equals(left,right);
    }

如果我失去了不区分大小写的功能，则将其替换为

Objects.equals(left.toLowerCase(),right.toLowerCase()); 

足够的？这样做有意义吗？

Answer 1

如果您不仅限于 JDK，您还可以使用

StringUtils.equalsIgnoreCase(CharSequence str1, CharSequence str2)

来自 apache-commons lang这是空安全的，将返回

 StringUtils.equalsIgnoreCase(null, null)   = true
 StringUtils.equalsIgnoreCase(null, "abc")  = false
 StringUtils.equalsIgnoreCase("abc", null)  = false
 StringUtils.equalsIgnoreCase("abc", "abc") = true
 StringUtils.equalsIgnoreCase("abc", "ABC") = true