指派運算符
指派運算符是指為變量或常量指定數值的符号。如可以使用 “=” 将右邊的表達式結果賦給左邊的操作數。
Java支援的常用的運算符
代碼執行個體
public class Test {
public static void main(String[] args) {
int a = 10;
int b = 20;
int c = 0;
c = a + b;
System.out.println("c = a + b = " + c );
c += a ;
System.out.println("c += a = " + c );
c -= a ;
System.out.println("c -= a = " + c );
c *= a ;
System.out.println("c *= a = " + c );
a = 10;
c = 15;
c /= a ;
System.out.println("c /= a = " + c );
a = 10;
c = 15;
c %= a ;
System.out.println("c %= a = " + c );
c <<= 2 ;
System.out.println("c <<= 2 = " + c );
c >>= 2 ;
System.out.println("c >>= 2 = " + c );
c >>= 2 ;
System.out.println("c >>= a = " + c );
c &= a ;
System.out.println("c &= 2 = " + c );
c ^= a ;
System.out.println("c ^= a = " + c );
c |= a ;
System.out.println("c |= a = " + c );
}
}
運作結果為
c = a + b = 30
c += a = 40
c -= a = 30
c *= a = 300
c /= a = 1
c %= a = 5
c <<= 2 = 20
c >>= 2 = 5
c >>= 2 = 1
c &= a = 0
c ^= a = 10
c |= a = 10
總結
其實在Java程式設計中,我認為常用的是上面表中前面的五種指派運算。後面的五種,我很少用隻是偶爾要用到的時候,我才會去找他們的使用的方法。現在自己有寫部落格,以後可以看自己的部落格筆記。