java-numbers and strings-exercises

Automatic Boxing

You do not need to call the constructor method, by using the = symbol to automatically convert the base type to the class type is called boxing

  int i = 5;         //基本类型转换成封装类型        Integer it = new Integer(i); //装箱-》实质它做了这个操作                 //自动转换就叫装箱        Integer it2 = i;

Automatic unpacking

       int i = 5;          Integer it = new Integer(i);                  //封装类型转换成基本类型        int i2 = it.intValue(); // 拆箱-》实质它做了这个操作                 //自动转换就叫拆箱        int i3 = it;              }

Topic 1

1. Automatic unpacking and auto-boxing of byte,short,float,double
   

2. Can auto-unpacking and auto-boxing between byte and integer

3. Gets the maximum value of byte by byte

java-numbers and strings-exercises