public?class?HelloWorld{
????public?static?void?main(String[]?args)?{
????int?one?=?10?;
????????int?two?=?20?;
????????int?three?=?0?;
????????three=one+two;
????????System.out.println("three=one+two==>"+three);
????????three+=one;
?????????System.out.println("three+=one+two==>"+three);
?????????three-=one;
?????????System.out.println("three-=one==>"+three);
?????????three*=one;
?????????System.out.println("three*=one==>"+three);
?????????three/=one;
?????????System.out.println("three/=one==>"+three);
?????????three%=one;
?????????System.out.println("three%=one==>"+three);
2017-10-02
這無所謂啊，反正three都被重新賦值了three=one+two;你把three定義個其他數(shù)字也行，
2017-10-18
你可以把它看成是int there，它只是把初始默認(rèn)值打出來了！
2017-10-03
在main方法中的變量要進(jìn)行初始化
2017-10-03
java的main方法中屬性需要先進(jìn)行初始化，否則編譯運行會報錯；由于three是int類型，所以只要給它賦一個int類型的值即可
2017-10-02
three是個變量，是為了保存經(jīng)過計算后的three的值。賦值0是代表three的初始值是0；另一方面，下面的每一步計算都會繼承上一步得到的three的值；如果不想繼承，需在每一步新的計算之前都得寫上three=0.
?Answer over!