== will work some of the time, as java has a String pool, where it tries to reuse memory references of commonly used strings. But == compares ... ... <看更多>

Every competent Java programmer knows that you need to use String.equals() to compare a string, rather than == because == checks for reference equality. ... <看更多>

But the comparison s1 === s2 evaluates to false . To understand how it works, you first need to know the concept of grapheme and combining characters. What is a ... ... <看更多>