Java笔试常见题型
类型 缓存范围 Byte -128-127 Short -128-127 Integer -128-127 Long -128-127 Character 0-127
常见笔试题
public class Main {
public static void main(String[] args) {
//[-128,127]
Integer i1 = 10;
Integer i2 = 10;
System.out.println(i1 == i2); //true
System.out.println(i1.equals(i2)); //true
Integer i3 = -128;
Integer i4 = -128;
System.out.println(i3 == i4); //true
System.out.println(i3.equals(i4)); //true
}
public class Main {
public static void main(String[] args) {
//[-128,127]
Integer i1 = 200;
Integer i2 = 200;
System.out.println(i1 == i2); //false
System.out.println(i1.equals(i2)); //true
Integer i3 = -128;
Integer i4 = -128;
System.out.println(i3 == i4); //true
System.out.println(i3.equals(i4));
//true
}
推荐阅读：深入剖析Java中的装箱和拆箱
https://www.cnblogs.com/dolphin0520/p/3780005.html
Original: https://www.cnblogs.com/iforeverhz/p/16257056.html
Author: iforeverhz
Title: Java基础封装类型的缓存
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