初始化包装器目标

Question

i与Integer x1 = 5;

的区别如何？

Integer x1 = new Integer(5);

此代码显示两次不显示Same对象，正如我预期的那样。为什么呢？

PS：规则是：为了节省内存，当它们的原始值相同时，以下包装器对象的两个实例总是==：Boolean;字节;字符从\ u到\ u007f;短和整数从-128到127

Answer 1

// Prints because of autoboxing ie it converts to integer value.
if (x1 == x2) System.out.println("Same object"); 
/* 
 * Doesn't prints because of creating an object(x3) using Integer wrapper class 
 * which is different from other object x4. ie both are different object 
 * pointing to different memory location in memory.
 */
if (x3 == x4) System.out.println("Same object");