Example usage for java.lang.reflect Field getDouble

List of usage examples for java.lang.reflect Field getDouble

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Introduction

In this page you can find the example usage for java.lang.reflect Field getDouble.

Prototype

@CallerSensitive
@ForceInline 
public double getDouble(Object obj) throws IllegalArgumentException, IllegalAccessException

Source Link

Document

Gets the value of a static or instance field of type double or of another primitive type convertible to type double via a widening conversion.

Usage

From source file:MyClass.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("MyClass");
    MyClass x = (MyClass) clazz.newInstance();

    Field f = clazz.getField("i");
    System.out.println(f.getDouble(x));

    f.setDouble(x, 9.99);/*from  www.ja  v  a 2 s .c  om*/
    System.out.println(f.getDouble(x));

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    Object clazz = new TestClass();
    String lookingForValue = "firstValue";

    Field field = clazz.getClass().getField(lookingForValue);
    Class clazzType = field.getType();
    if (clazzType.toString().equals("double"))
        System.out.println(field.getDouble(clazz));
    else if (clazzType.toString().equals("int"))
        System.out.println(field.getInt(clazz));

    //System.out.println(field.get(clazz));
}

From source file:X.java

public static void main(String[] args) throws Exception {
    Class<?> clazz = Class.forName("X");
    X x = (X) clazz.newInstance();/*from  w  w w.  j  a  va  2 s .c o m*/
    Field f = clazz.getField("i");
    System.out.println(f.getInt(x)); // Output: 10
    f.setInt(x, 20);
    System.out.println(f.getInt(x)); // Output: 20
    f = clazz.getField("PI");
    System.out.println(f.getDouble(null)); // Output: 3.14
    f.setDouble(x, 20);
}

From source file:Main.java

public static Object getStaticField(Class clz, String fieldName, int type) {
    if (null != clz) {
        try {//from   w w w . j av  a  2 s  .  c o  m
            Field field = clz.getField(fieldName);
            switch (type) {
            case TYPE_OBJECT:
                return field.get(clz);
            case TYPE_INT:
                return field.getInt(clz);
            case TYPE_SHORT:
                return field.getShort(clz);
            case TYPE_BYTE:
                return field.getByte(clz);
            case TYPE_BOOLEAN:
                return field.getBoolean(clz);
            case TYPE_FLOAT:
                return field.getFloat(clz);
            case TYPE_LONG:
                return field.getLong(clz);
            case TYPE_DOUBLE:
                return field.getDouble(clz);
            default:
                return field.get(clz);
            }
        } catch (Exception e) {
        }
        return (clz == Object.class ? getDefault(type) : getStaticField(clz.getSuperclass(), fieldName, type));
    }
    return getDefault(type);
}

From source file:com.oneis.javascript.Runtime.java

private static void checkJavaScriptTimeZoneIsGMT() {
    // Check that the timezone is GMT - datetime.js has created a Date object to run static initializers.
    // This is specific to the exact version of the Rhino implementation, but should fail gracefully if it's changed.
    boolean nativeDateTimeZoneOK = false;
    try {/*from w w w . j a v a 2  s.com*/
        java.lang.Class nativeDate = java.lang.Class.forName("org.mozilla.javascript.NativeDate");
        java.lang.reflect.Field nativeDateTimeZoneField = nativeDate.getDeclaredField("thisTimeZone");
        nativeDateTimeZoneField.setAccessible(true);
        java.util.TimeZone tz = (java.util.TimeZone) nativeDateTimeZoneField.get(null);
        java.lang.reflect.Field nativeDateLocalTZAField = nativeDate.getDeclaredField("LocalTZA");
        nativeDateLocalTZAField.setAccessible(true);
        if (tz != null && (tz.getID().equals("GMT0") || tz.getID().equals("GMT") || tz.getID().equals("UTC"))
                && nativeDateLocalTZAField.getDouble(null) == 0.0) {
            nativeDateTimeZoneOK = true;
        }
    } catch (Exception e) {
        // Ignore, nativeDateTimeZoneOK won't be set to true.
    }
    if (!nativeDateTimeZoneOK) {
        System.out.println("\n\nThe operating system's time zone must be set to GMT (GMT0 Java TimeZone).\n");
        throw new RuntimeException("JavaScript interpreter's local time zone is not GMT (GMT0 Java TimeZone).");
    }
}

From source file:Main.java

public static ContentValues objectToContentValues(Object object) {
    if (object == null) {
        throw new IllegalArgumentException("please check your argument");
    }//from   w  w  w .ja  va2s .c o  m
    ContentValues contentValues = new ContentValues();
    try {
        Field[] fields = object.getClass().getDeclaredFields();
        for (Field field : fields) {
            String fieldName = field.getName();
            Type type = field.getType();
            field.setAccessible(true);
            if (type.equals(String.class)) {
                contentValues.put(fieldName, field.get(object).toString());
            } else if (type.equals(Integer.class) || type.equals(Integer.TYPE)) {
                contentValues.put(fieldName, field.getInt(object));
            } else if (type.equals(Float.class) || type.equals(Float.TYPE)) {
                contentValues.put(fieldName, field.getFloat(object));
            } else if (type.equals(Long.class) || type.equals(Long.TYPE)) {
                contentValues.put(fieldName, field.getLong(object));
            } else if (type.equals(Double.class) || type.equals(Double.TYPE)) {
                contentValues.put(fieldName, field.getDouble(object));
            } else if (type.equals(Boolean.class) || type.equals(Boolean.TYPE)) {
                contentValues.put(fieldName, field.getBoolean(object));
            }
        }
    } catch (IllegalAccessException | IllegalArgumentException e) {
        e.printStackTrace();
    }
    return contentValues;
}

From source file:org.apache.openjpa.enhance.Reflection.java

/**
 * Return the value of the given field in the given object.
 *//*from w w w . j  av  a  2  s . co  m*/
public static double getDouble(Object target, Field field) {
    if (target == null || field == null)
        return 0D;
    makeAccessible(field, field.getModifiers());
    try {
        return field.getDouble(target);
    } catch (Throwable t) {
        throw wrapReflectionException(t, _loc.get("get-field", target, field));
    }
}

From source file:org.acoveo.tools.Reflection.java

/**
 * Return the value of the given field in the given object.
 *//*from  w w  w .j a v  a 2 s .c  o  m*/
public static double getDouble(Object target, Field field) {
    if (target == null || field == null)
        return 0D;
    makeAccessible(field, field.getModifiers());
    try {
        return field.getDouble(target);
    } catch (Throwable t) {
        throw wrapReflectionException(t);
    }
}

From source file:com.zlfun.framework.excel.ExcelUtils.java

private static String get(Object obj, Field field) {

    try {/* w w  w  .j a  v  a 2 s . c  om*/
        if (!field.isAccessible()) {
            field.setAccessible(true);
        }

        if (field.getType() == int.class) {
            return String.valueOf(field.getInt(obj));

        } else if (field.getType() == long.class) {
            return String.valueOf(field.getLong(obj));

        } else if (field.getType() == double.class) {
            return String.valueOf(field.getDouble(obj));
        } else if (field.getType() == byte.class) {
            return String.valueOf(field.getByte(obj));
        } else if (field.getType() == boolean.class) {
            return String.valueOf(field.getBoolean(obj));
        } else if (field.getType() == String.class) {
            if (field.get(obj) == null) {
                return "";
            }
            return String.valueOf(field.get(obj));
        } else if (field.getType() == Date.class) {
            if (field.get(obj) == null) {
                return "";
            }
            return MiscDateUtils.getDateTime((Date) field.get(obj));
        }

    } catch (Exception e) {

    }
    return "";
}

From source file:de.thkwalter.et.ortskurve.OrtskurveTest.java

/**
 * Dieser Test berprft den Konstruktor {@link Ortskurve#Ortskurve(Vector2D, double)}.
 * @throws NoSuchFieldException /*w ww .  ja v a 2  s . c  om*/
 * @throws SecurityException 
 * @throws IllegalAccessException 
 * @throws IllegalArgumentException 
 */
@Test
public void testOrtskurve()
        throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException {
    // Es wird berprft, ob das Objekt der zu testenden Klasse erzeugt worden ist.
    assertNotNull(this.ortskurve);

    // Der Mittelpunkt der Ortskurve wird gelesen.
    Field mittelpunktOrtskurveFeld = Ortskurve.class.getDeclaredField("mittelpunktOrtskurve");
    mittelpunktOrtskurveFeld.setAccessible(true);
    Vector2D mittelpunktOrtskurve = (Vector2D) mittelpunktOrtskurveFeld.get(this.ortskurve);

    // Es wird berprft, ob der Mittelpunkt der Ortskurve korrekt initialisiert worden ist.
    assertEquals(this.testMittelpunktOrtskurve, mittelpunktOrtskurve);

    // Der Radius der Ortskurve wird gelesen.
    Field radiusOrtskurveFeld = Ortskurve.class.getDeclaredField("radiusOrtskurve");
    radiusOrtskurveFeld.setAccessible(true);
    double radiusOrtskurve = radiusOrtskurveFeld.getDouble(this.ortskurve);

    // Es wird berprft, ob der Mittelpunkt der Ortskurve korrekt initialisiert worden ist.
    assertEquals(this.testRadiusOrtskurve, radiusOrtskurve, 0.0);
}