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Java 1.1 language feature tests: local & anonymous classes, initializers, blank finals, class literals #81

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Merged
mperor merged 3 commits into from
Sep 28, 2026
Merged

Java 1.1 language feature tests: local & anonymous classes, initializers, blank finals, class literals #81

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c688479
Clarify Properties internals, comment nested classes and use placehol…
mperor Sep 26, 2026
92b48de
Add arbitrary-precision arithmetic test to Java 1.1
mperor Sep 27, 2026
7c1294e
Add Java 1.1 language feature tests: local & anonymous classes, initi…
mperor Sep 28, 2026
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Add arbitrary-precision arithmetic test to Java 1.1
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@mperor
mperor committed Sep 27, 2026
commit 92b48de0d49b60862744100085c66254ec0fe7ec
22 changes: 22 additions & 0 deletions JavaReleases/src/test/java/pl/mperor/lab/java/Java1.java
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Expand Up @@ -13,6 +13,8 @@
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.rmi.NotBoundException;
import java.rmi.Remote;
import java.rmi.RemoteException;
Expand Down Expand Up @@ -192,4 +194,24 @@ public void testCharacterStreams() throws IOException {
}
}

@Test
public void testArbitraryPrecisionArithmetic() {
// Java 1.1 added java.math - double cannot represent most decimal fractions exactly, BigDecimal can
Assertions.assertNotEquals(0.3, 0.1 + 0.2);
Assertions.assertEquals(new BigDecimal("0.3"), new BigDecimal("0.1").add(new BigDecimal("0.2")));

// BigDecimal(double) keeps the binary approximation of the double - prefer the String constructor
Assertions.assertNotEquals(new BigDecimal("0.1"), new BigDecimal(0.1));
Assertions.assertEquals(new BigDecimal("0.1"), BigDecimal.valueOf(0.1)); // valueOf (Java 5) goes through Double.toString

// equals compares value & scale, while compareTo compares only the numerical value
Assertions.assertNotEquals(new BigDecimal("2.0"), new BigDecimal("2.00"));
Assertions.assertEquals(0, new BigDecimal("2.0").compareTo(new BigDecimal("2.00")));

// long silently overflows, while BigInteger has no fixed upper bound
Assertions.assertEquals(Long.MIN_VALUE, Long.MAX_VALUE + 1);
BigInteger beyondLong = BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.ONE);
Assertions.assertEquals(new BigInteger("9223372036854775808"), beyondLong);
}

}
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