我了解这部分:
Integer myInt;
myInt = new Integer(42);
if (myInt != null && myInt.intValue() == 42) {
System.out.println("Comparing 42 to 42");
}
myInt = null;
if (myInt != null & myInt.intValue() == 42) {
System.out.println("Comparing null to 42");
}
输出:
Comparing 42 to 42
Exception in thread "main" java.lang.NullPointerException
我不明白的是:
System.out.println("Result:" +(1 & 3));
System.out.println("Result2:" +(2 | 3));
Result:1
Result2:3
如果不比较布尔值,为什么要给出这个结果?