Q:java中==跟equals比较字符串为啥不同?
A:这些例子足够证明了
// These two have the same value
new String("test").equals("test") // --> true
// ... but they are not the same object
new String("test") == "test" // --> false
// ... neither are these
new String("test") == new String("test") // --> false
// ... but these are because literals are interned by
// the compiler and thus refer to the same object
"test" == "test" // --> true
// ... but you should really just call
Objects.equals()Objects.equals("test", new String("test")) // --> true
Objects.equals(null, "test") // --> false
所以java中请使用equals来比较字符串,而不是使用==
==测试对象引用是否相同,而equals是值是否相同.
