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fix Calculator.conversion EmptyStackException bug #2076

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merged 1 commit into from Jan 7, 2022
Merged

fix Calculator.conversion EmptyStackException bug #2076

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2 changes: 1 addition & 1 deletion hutool-core/src/main/java/cn/hutool/core/math/Calculator.java
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Expand Up @@ -191,7 +191,7 @@ private static String transform(String expression) {
}
}
}
if (arr[0] == '~' || (arr.length > 1 && arr[1] == '(')) {
if (arr[0] == '~' && (arr.length > 1 && arr[1] == '(')) {
arr[0] = '-';
return "0" + new String(arr);
} else {
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9 changes: 7 additions & 2 deletions hutool-core/src/test/java/cn/hutool/core/math/CalculatorTest.java
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Expand Up @@ -31,10 +31,15 @@ public void conversationTest4(){
}

@Test
@Ignore
public void conversationTest5(){
// https://github.com/dromara/hutool/issues/1984
final double conversion = Calculator.conversion("((1/1) / (1/1) -1) * 100");
Assert.assertEquals((88D * 66 / 23) % 26, conversion, 2);
Assert.assertEquals(0, conversion, 2);
}

@Test
public void conversationTest6() {
final double conversion = Calculator.conversion("-((2.12-2) * 100)");
Assert.assertEquals(-1D * (2.12 - 2) * 100, conversion, 2);
}
}