关于java的知识浩瀚如烟海，这需要我们全身心地投入其中，用心学习。今天为大家简要概括一下java的运算符主要分为哪几类，以及为每一个类别展示一个实例。
首先，我们知道，java提供了一套丰富的运算符来操纵变量。所以我们可以把这些运算符大致地分为以下五类。
第一类，算术运算符;它们在数学表达式中，作用和在数学中的作用一样。下面通过一个实例来展现一下：
public class Test
{
public static void main(String[] args)
{
int a = 10;
int b = 20;
int c = 25;
int d = 25;
System.out.println("a + b = " + (a + b));
System.out.println("a - b = " + (a - b));
System.out.println("a * b = " + (a * b));
System.out.println("b / a = " + (b / a));
System.out.println("b % a = " + (b % a));
System.out.println("c % a = " + (c % a));
System.out.println("a++ = " + (a++));
System.out.println("a-- = " + (a--));
// 查看 d++ 与 ++d 的不同
System.out.println("d++ = " + (d++));
System.out.println("++d = " + (++d));
}
}实例的运行结果如下：
a + b = 30 a - b = -10 a * b = 200 b / a = 2 b % a = 0 c % a = 5 a++ = 10 a-- = 11 d++ = 25 ++d = 27
第二类是自增自减运算符;它是一种特殊的算术运算符，通常在算术运算符中需要两个操作数来进行运算，而自增自减运算符只需要一个操作数。实例展示如下：
public class selfAddMinus
{
public static void main(String[] args)
{
int a = 3; //定义一个变量；
int b = ++a; //自增运算
int c = 3;
int d = --c; //自减运算
System.out.println("进行自增运算后的值等于" + b);
System.out.println("进行自减运算后的值等于" + d);
}
}运行结果为：
进行自增运算后的值等于4 进行自减运算后的值等于2
解析如下：
1.int b = ++a; 拆分运算过程为: a=a+1=4; b=a=4, 最后结果为b=4,a=4
2.int d = --c; 拆分运算过程为: c=c-1=2; d=c=2, 最后结果为d=2,c=2
第三类是关系运算符，实例展示如下：
public class Test
{
public static void main(String[] args)
{
int a = 10;
int b = 20;
System.out.println("a == b = " + (a == b));
System.out.println("a != b = " + (a != b));
System.out.println("a > b = " + (a > b));
System.out.println("a < b = " + (a < b));
System.out.println("b >= a = " + (b >= a));
System.out.println("b <= a = " + (b <= a));
}
}运行结果如下：
a == b = false a != b = true a > b = false a < b = true b >= a = true b <= a = false
第四类是位运算符，它应用于整数类型(int)，长整型(long)，短整型(short)，字符型(char)，和字节型(byte)等类型。
它的实例展示如下：
public class Test
{
public static void main(String[] args)
{
int a = 60; /* 60 = 0011 1100 */
int b = 13; /* 13 = 0000 1101 */
int c = 0;
c = a & b; /* 12 = 0000 1100 */
System.out.println("a & b = " + c);
c = a | b; /* 61 = 0011 1101 */
System.out.println("a | b = " + c);
c = a ^ b; /* 49 = 0011 0001 */
System.out.println("a ^ b = " + c);
c = ~a; /*-61 = 1100 0011 */
System.out.println("~a = " + c);
c = a << 2; /* 240 = 1111 0000 */
System.out.println("a << 2 = " + c);
c = a >> 2; /* 15 = 1111 */
System.out.println("a >> 2 = " + c);
c = a >>> 2; /* 15 = 0000 1111 */
System.out.println("a >>> 2 = " + c);
}
}运行结果如下：
a & b = 12 a | b = 61 a ^ b = 49~a = -61 a << 2 = 240 a >> 2 = 15 a >>> 2 = 15
第四类是逻辑运算符，实例展示如下：
public class Test
{
public static void main(String[] args)
{
boolean a = true;
boolean b = false;
System.out.println("a && b = " + (a && b));
System.out.println("a || b = " + (a || b));
System.out.println("!(a && b) = " + !(a && b));
}
}运行结果如下：
a && b = false a || b = true!(a && b) = true
第五类是赋值运算符，实例展示如下：
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 >>= 2 = " + 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);
}
}运行结果如下：
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
以上主要是概括了这五类运算符，java运算符内容丰富，需要大家花费更多的心思去学习。想要了解更多java经典例子，敬请关注奇Q工具网。
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