JAVA boolean 构造函数给出了意想不到的结果

Question

我刚刚写了一段代码:

Boolean b1 = new Boolean("programmer");
Boolean b2 = new Boolean("tester");
System.out.println(b1.equals(b2));

它打印 true 作为输出。 为什么？

According to JAVA documentation

new Boolean(String): Allocates a Boolean object representing the value true if the string argument is not null and is equal, ignoring case, to the string "true".

Answer 1

Boolean b1 = new Boolean("programmer"); // false
Boolean b2 = new Boolean("tester"); // false

因此测试 false == false 是 true。

<小时/>

From public Boolean(String s) constructor signature:

• Boolean.parseBoolean("True") returns true

• Boolean.parseBoolean("yes") returns false