Package java.math

Examples of java.math.RoundingMode

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     * new BigDecimal(double, MathContext)
     */
    public void testConstrDoubleMathContext() {
        double a = 732546982374982347892379283571094797.287346782359284756;
        int precision = 21;
        RoundingMode rm = RoundingMode.CEILING;
        MathContext mc = new MathContext(precision, rm);
        String res = "732546982374982285074";
        int resScale = -15;
        BigDecimal result = new BigDecimal(a, mc);
        assertEquals("incorrect value", res, result.unscaledValue().toString());
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     * new BigDecimal(int, MathContext)
     */
    public void testConstrIntMathContext() {
        int a = 732546982;
        int precision = 21;
        RoundingMode rm = RoundingMode.CEILING;
        MathContext mc = new MathContext(precision, rm);
        String res = "732546982";
        int resScale = 0;
        BigDecimal result = new BigDecimal(a, mc);
        assertEquals("incorrect value", res, result.unscaledValue().toString());
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     * new BigDecimal(long, MathContext)
     */
    public void testConstrLongMathContext() {
        long a = 4576578677732546982L;
        int precision = 5;
        RoundingMode rm = RoundingMode.CEILING;
        MathContext mc = new MathContext(precision, rm);
        String res = "45766";
        int resScale = -14;
        BigDecimal result = new BigDecimal(a, mc);
        assertEquals("incorrect value", res, result.unscaledValue().toString());
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     * new BigDecimal(String value, MathContext)
     */
    public void testConstrStringMathContext() {
        String a = "-238768787678287e214";
        int precision = 5;
        RoundingMode rm = RoundingMode.CEILING;
        MathContext mc = new MathContext(precision, rm);
        String res = "-23876";
        int resScale = -224;
        BigDecimal result = new BigDecimal(a, mc);
        assertEquals("incorrect value", res, result.unscaledValue().toString());
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        RubyBigDecimal res = handleAddSpecialValues(val);
        if (res != null) {
            return res;
        }
        RoundingMode roundMode = getRoundingMode(runtime);
        return new RubyBigDecimal(runtime, value.add(
                val.value, new MathContext(prec, roundMode))); // TODO: why this: .setResult();
    }
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    }

    @JRubyMethod(name = "round", optional = 2)
    public IRubyObject round(ThreadContext context, IRubyObject[] args) {
        int scale = args.length > 0 ? num2int(args[0]) : 0;
        RoundingMode mode = (args.length > 1) ? javaRoundingModeFromRubyRoundingMode(args[1]) : getRoundingMode(context.runtime);
        // JRUBY-914: Java 1.4 BigDecimal does not allow a negative scale, so we have to simulate it
        if (scale < 0) {
          // shift the decimal point just to the right of the digit to be rounded to (divide by 10**(abs(scale)))
          // -1 -> 10's digit, -2 -> 100's digit, etc.
          BigDecimal normalized = value.movePointRight(scale);
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        if (longMode == ROUND_MODE) {
            if (value.isNil()) {
                return c.searchInternalModuleVariable("vpRoundingMode");
            }

            RoundingMode javaRoundingMode = javaRoundingModeFromRubyRoundingMode(context.runtime, value);
            RubyFixnum roundingMode = context.runtime.newFixnum(javaRoundingMode.ordinal());
            c.setInternalModuleVariable("vpRoundingMode", roundingMode);

            return c.searchInternalModuleVariable("vpRoundingMode");
        }
        throw context.runtime.newTypeError("first argument for BigDecimal#mode invalid");
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        }

        RubyBigDecimal res = handleAddSpecialValues(val);
        if (res != null) return res;

        RoundingMode roundMode = getRoundingMode(runtime);
        return new RubyBigDecimal(runtime, value.add(
                val.value, new MathContext(prec, roundMode))); // TODO: why this: .setResult();
    }
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            } else if (isInfinity()) {
                return newInfinity(context.runtime, infinitySign);
            }
        }

        RoundingMode mode = (args.length > 1) ? javaRoundingModeFromRubyRoundingMode(context.runtime, args[1]) : getRoundingMode(context.runtime);
        // JRUBY-914: Java 1.4 BigDecimal does not allow a negative scale, so we have to simulate it
        RubyBigDecimal bigDecimal = null;
        if (scale < 0) {
          // shift the decimal point just to the right of the digit to be rounded to (divide by 10**(abs(scale)))
          // -1 -> 10's digit, -2 -> 100's digit, etc.
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     */
    public void testAbsMathContextNeg() {
        String a = "-123809648392384754573567356745735.63567890295784902768787678287E+21";
        BigDecimal aNumber = new BigDecimal(a);
        int precision = 15;
        RoundingMode rm = RoundingMode.HALF_DOWN;
        MathContext mc = new MathContext(precision, rm);
        String result = "1.23809648392385E+53";
        int resScale = -39;
        BigDecimal res = aNumber.abs(mc);
        assertEquals("incorrect value", result, res.toString());
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Related Classes of java.math.RoundingMode

  • com.google.gwt.emultest.java.math.BigDecimalArithmeticTest
  • com.google.gwt.emultest.java.math.BigDecimalCompareTest
  • com.google.gwt.emultest.java.math.BigDecimalConstructorsTest
  • hirondelle.web4j.Controller
  • org.apache.harmony.tests.java.math.BigDecimalArithmeticTest
  • org.apache.harmony.tests.java.math.BigDecimalCompareTest
  • org.apache.harmony.tests.java.math.BigDecimalConstructorsTest
  • org.apache.pig.builtin.DoubleRoundTo
  • org.apache.pig.builtin.FloatRoundTo
  • org.apache.pig.builtin.ROUND_TO
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