Java运算符总结

　　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:
　　//!