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add engine and fix bug

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This commit is contained in:
Looly
2020-11-18 00:34:51 +08:00
parent 83a2244f80
commit 9867333f68
5 changed files with 21 additions and 20 deletions
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2
hutool-core/src/main/java/cn/hutool/core/math/Calculator.java
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@@ -53,7 +53,7 @@ public class Calculator {
}
}
}
if (arr[0] == '~' || arr[1] == '(') {
if (arr[0] == '~' || (arr.length > 1 && arr[1] == '(')) {
arr[0] = '-';
return "0" + new String(arr);
} else {

6
hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java
View File

@@ -16,4 +16,10 @@ public class CalculatorTest {
final double conversion = Calculator.conversion("77 * 12");
Assert.assertEquals(924.0, conversion, 2);
}
@Test
public void conversationTest3(){
final double conversion = Calculator.conversion("1");
Assert.assertEquals(1, conversion, 2);
}
}