操作符 含义 Java等价物
关系操作符
== equality ==
<> inequality !=
< less than <
> greater than >
<= less than or equal <=
>= greater than or equal >=
布尔操作符
and logical and &&
or logical or ||
not logical negation !
算术操作符
+ addition +
- subtraction; unary negation -
* multiplication *
/ division /
% remainder %
+= add and assign +=
-= subtract and assign -=
*= multiply and assign *=
/= divide and assign /=
%= remainder and assign %=
其它操作符
sizeof array length n/a
indexof ordinal position n/a
ife1thene2elsee3 conditional expression e1?e2:e3
select list comprehension n/a
foreach list comprehension n/a
new allocation new
op() function/operation call n/a
x.op() member function/operation call x.op()
instanceof type check instanceof
this self access this
. attribute access, context access ., n/a
bind [lazy] incremental [lazy] evaluation n/a
: eager initialization n/a
[] array selection []
format as String formatting n/a
<<>> Identifier quotes n/a
{} String expression n/a
(expr) grouping (expr)
reverse reverses a list n/a
[number1,next..number2] numeric range n/a
一些示例：
import java.lang.System;
import java.lang.Math;
var x = 2;
var y = 4;
var a = true;
var b = false;
System.out.println(x == y); // prints false
System.out.println(x <> y); // prints true
System.out.println(x < y); // prints true
System.out.println(x > y); // prints true
System.out.println(x >= y); // prints false
System.out.println(x <= y); // prints true
System.out.println(x + y); // prints 6
System.out.println(x - y); // prints -2
System.out.println(x * y); // prints 8
System.out.println(x / y); // prints 0.5
System.out.println(x % y); // prints 2
System.out.println(a and b); // prints false
System.out.println(a or b); // prints true
System.out.println(not a); // prints false
System.out.println(sizeof [x,y]); // prints 2
System.out.println([x,y][indexof . == 0]); // prints 2
System.out.println(if a then x else y); // prints 2
System.out.println(select q from q in [x, y] where q > 3); prints 4
System.out.println(foreach(q in [x, y] where q < 3) q); prints 2
System.out.println(Math.max(x, y)); // prints 4
System.out.println("abc".toUpperCase()); // prints ABC
System.out.println(x instanceof Number); // prints true
x = 10;
System.out.println(x); // prints 10
