运算符总结

　　下面这个例子向大家展示了如何随同特定的运算符使用主数据类型。从根本上说，它是同一个例子反反复复地执行，只是使用了不同的主数据类型。文件编译时不会报错，因为那些会导致错误的行已用//!变成了注释内容。

　　//: AllOps.java

　　// Tests all the operators on all the

　　// primitive data types to show which

　　// ones are accepted by the Java compiler.

　　class AllOps {

　　// To accept the results of a boolean test:

　　void f(boolean b) {}

　　void boolTest(boolean x, boolean y) {

　　// Arithmetic operators:

　　//! x = x * y;

　　//! x = x / y;

　　//! x = x % y;

　　//! x = x + y;

　　//! x = x - y;

　　//! x++;

　　//! x--;

　　//! x = +y;

　　//! x = -y;

　　// Relational and logical:

　　//! f(x > y);

　　//! f(x >= y);

　　//! f(x <

　　y);

　　//! f(x < = y);

　　f(x == y);

　　f(x != y);

　　f(!y);

　　x = x && y;

　　x = x || y;

　　// Bitwise operators:

　　//! x = ~y;

　　x = x & y;

　　x = x | y;

　　x = x ^ y;

　　//! x = x < <

　　1;

　　//! x = x >> 1;

　　//! x = x >>> 1;

　　// Compound assignment:

　　//! x += y;

　　//! x -= y;

　　//! x *= y;

　　//! x /= y;

　　//! x %= y;

　　//! x < < = 1;

　　//! x >>= 1;

　　//! x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//! char c = (char)x;

　　//! byte B = (byte)x;

　　//! short s = (short)x;

　　//! int i = (int)x;

　　//! long l = (long)x;

　　//! float f = (float)x;

　　//! double d = (double)x;

　　}

　　void charTest(char x, char y) {

　　// Arithmetic operators:

　　x = (char)(x * y);

　　x = (char)(x / y);

　　x = (char)(x % y);

　　x = (char)(x + y);

　　x = (char)(x - y);

　　x++;

　　x--;

　　x = (char)+y;

　　x = (char)-y;

　　// Relational and logical:

　　f(x > y);

　　f(x >= y);

　　f(x <

　　y);

　　f(x < = y);

　　f(x == y);

　　f(x != y);

　　//! f(!x);

　　//! f(x && y);

　　//! f(x || y);

　　// Bitwise operators:

　　x= (char)~y;

　　x = (char)(x & y);

　　x

　　= (char)(x | y);

　　x = (char)(x ^ y);

　　x = (char)(x < <

　　1);

　　x = (char)(x >> 1);

　　x = (char)(x >>> 1);

　　// Compound assignment:

　　x += y;

　　x -= y;

　　x *= y;

　　x /= y;

　　x %= y;

　　x < < = 1;

　　x >>= 1;

　　x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//! boolean b = (boolean)x;

　　byte B = (byte)x;

　　short s = (short)x;

　　int i = (int)x;

　　long l = (long)x;

　　float f = (float)x;

　　double d = (double)x;

　　}

　　void byteTest(byte x, byte y) {

　　// Arithmetic operators:

　　x = (byte)(x* y);

　　x = (byte)(x / y);

　　x = (byte)(x % y);

　　x = (byte)(x + y);

　　x = (byte)(x - y);

　　x++;

　　x--;

　　x = (byte)+ y;

　　x = (byte)- y;

　　// Relational and logical:

　　f(x > y);

　　f(x >= y);

　　f(x <

　　y);

　　f(x < = y);

　　f(x == y);

　　f(x != y);

　　//! f(!x);

　　//! f(x && y);

　　//! f(x || y);

　　// Bitwise operators:

　　x = (byte)~y;

　　x = (byte)(x & y);

　　x = (byte)(x | y);

　　x = (byte)(x ^ y);

　　x = (byte)(x < <

　　1);

　　x = (byte)(x >> 1);

　　x = (byte)(x >>> 1);

　　// Compound assignment:

　　x += y;

　　x -= y;

　　x *= y;

　　x /= y;

　　x %= y;

　　x < < = 1;

　　x >>= 1;

　　x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//! boolean b = (boolean)x;

　　char c = (char)x;

　　short s = (short)x;

　　int i = (int)x;

　　long l = (long)x;

　　float f = (float)x;

　　double d = (double)x;

　　}

　　void shortTest(short x, short y) {

　　// Arithmetic operators:

　　x = (short)(x * y);

　　x = (short)(x / y);

　　x = (short)(x % y);

　　x = (short)(x + y);

　　x = (short)(x - y);

　　x++;

　　x--;

　　x = (short)+y;

　　x = (short)-y;

　　// Relational and logical:

　　f(x > y);

　　f(x >= y);

　　f(x <

　　y);

　　f(x < = y);

　　f(x == y);

　　f(x != y);

　　//! f(!x);

　　//! f(x && y);

　　//! f(x || y);

　　// Bitwise operators:

　　x = (short)~y;

　　x = (short)(x & y);

　　x = (short)(x | y);

　　x = (short)(x ^ y);

　　x = (short)(x < <

　　1);

　　x = (short)(x >> 1);

　　x = (short)(x >>> 1);

　　// Compound assignment:

　　x += y;

　　x -= y;

　　x *= y;

　　x /= y;

　　x %= y;

　　x < < = 1;

　　x >>= 1;

　　x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//! boolean b = (boolean)x;

　　char c = (char)x;

　　byte B = (byte)x;

　　int i = (int)x;

　　long l = (long)x;

　　float f = (float)x;

　　double d = (double)x;

　　}

　　void intTest(int x, int y) {

　　// Arithmetic operators:

　　x = x * y;

　　x = x / y;

　　x = x % y;

　　x = x + y;

　　x = x - y;

　　x++;

　　x--;

　　x = +y;

　　x = -y;

　　// Relational and logical:

　　f(x > y);

　　f(x >= y);

　　f(x <

　　y);

　　f(x < = y);

　　f(x == y);

　　f(x != y);

　　//! f(!x);

　　//! f(x && y);

　　//! f(x || y);

　　// Bitwise operators:

　　x = ~y;

　　x = x & y;

　　x = x | y;

　　x = x ^ y;

　　x = x < <

　　1;

　　x = x >> 1;

　　x = x >>> 1;

　　// Compound assignment:

　　x += y;

　　x -= y;

　　x *= y;

　　x /= y;

　　x %= y;

　　x < < = 1;

　　x >>= 1;

　　x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//! boolean b = (boolean)x;

　　char c = (char)x;

　　byte B = (byte)x;

　　short s = (short)x;

　　long l = (long)x;

　　float f = (float)x;

　　double d = (double)x;

　　}

　　void longTest(long x, long y) {

　　// Arithmetic operators:

　　x = x * y;

　　x = x / y;

　　x = x % y;

　　x = x + y;

　　x = x - y;

　　x++;

　　x--;

　　x = +y;

　　x = -y;

　　// Relational and logical:

　　f(x > y);

　　f(x >= y);

　　f(x <

　　y);

　　f(x < = y);

　　f(x == y);

　　f(x != y);

　　//! f(!x);

　　//! f(x && y);

　　//! f(x || y);

　　// Bitwise operators:

　　x = ~y;

　　x = x & y;

　　x = x | y;

　　x = x ^ y;

　　x = x < <

　　1;

　　x = x >> 1;

　　x = x >>> 1;

　　// Compound assignment:

　　x += y;

　　x -= y;

　　x *= y;

　　x /= y;

　　x %= y;

　　x < < = 1;

　　x >>= 1;

　　x >>>= 1;

　　x &= y;

　　x ^= y;

　　x |= y;

　　// Casting:

　　//!