关系运算符允许对象的比较。以下是Groovy中可用的关系运算符 -
运算符 | 描述 | 例子 |
== | 测试两个对象之间的等同性 | 2 == 2将得到true |
!= | 测试两个对象之间的差异 | 3!= 2将得到true |
< | 检查左对象是否小于正确的操作数。 | 2 < 3将得到true |
<= | 检查左对象是否小于或等于右操作数。 | 2 < 3将得到true |
> | 检查左对象是否大于右操作数。 | 3 > 2将得到true |
>= | 检查左对象是否大于或等于右操作数。 | 3 = 2将得到true |
以下代码段显示了如何使用各种运算符。
- class Example {
- static void main(String[] args) {
- def x = 5;
- def y = 10;
- def z = 8;
- if(x == y) {
- println("x is equal to y");
- } else
- println("x is not equal to y");
- if(z != y) {
- println("z is not equal to y");
- } else
- println("z is equal to y");
- if(z != y) {
- println("z is not equal to y");
- } else
- println("z is equal to y");
- if(z<y) {
- println("z is less than y");
- } else
- println("z is greater than y");
- if(x<=y) {
- println("x is less than y");
- } else
- println("x is greater than y");
- if(x>y) {
- println("x is greater than y");
- } else
- println("x is less than y");
- if(x>=y) {
- println("x is greater or equal to y");
- } else
- println("x is less than y");
- }
- }
当我们运行上面的程序,我们将得到以下结果。可以看出,结果如从上面所示的操作符的描述所预期的。
- x is not equal to y
- z is not equal to y
- z is not equal to y
- z is less than y
- x is less than y
- x is less than y
- x is less than y
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