本文整理汇总了Java中sun.invoke.util.Wrapper.wrap方法的典型用法代码示例。如果您正苦于以下问题：Java Wrapper.wrap方法的具体用法？Java Wrapper.wrap怎么用？Java Wrapper.wrap使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sun.invoke.util.Wrapper的用法示例。
在下文中一共展示了Wrapper.wrap方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testRef2Prim
import sun.invoke.util.Wrapper; //导入方法依赖的package包/类
/**
* Tests that non-null wrapper reference is successfully converted to
* primitive types.
*/
public static void testRef2Prim() {
for (Wrapper from : Wrapper.values()) {
for (Wrapper to : Wrapper.values()) {
if (from == Wrapper.VOID || to == Wrapper.VOID
|| to == Wrapper.OBJECT) {
continue;
}
Object value = RANDOM_VALUES.get(from);
for (TestConversionMode mode : TestConversionMode.values()) {
if (from != Wrapper.OBJECT) {
Object convValue = to.wrap(value);
testConversion(mode, from.wrapperType(),
to.primitiveType(), value, convValue, false, null);
} else {
testConversion(mode, from.wrapperType(),
to.primitiveType(), value, null,
true, ClassCastException.class);
}
}
}
}
}
示例2: testPrim2Prim
import sun.invoke.util.Wrapper; //导入方法依赖的package包/类
/**
* Tests that primitive is successfully converted to other primitive type.
*/
public static void testPrim2Prim() {
for (Wrapper from : Wrapper.values()) {
for (Wrapper to : Wrapper.values()) {
if (from == Wrapper.VOID || to == Wrapper.VOID
|| from == Wrapper.OBJECT || to == Wrapper.OBJECT) {
continue;
}
Object value = RANDOM_VALUES.get(from);
Object convValue = to.wrap(value);
for (TestConversionMode mode : TestConversionMode.values()) {
testConversion(mode, from.primitiveType(),
to.primitiveType(), value, convValue, false, null);
}
}
}
}
示例3: testBox
import sun.invoke.util.Wrapper; //导入方法依赖的package包/类
@Test
public void testBox() throws Throwable {
for (Wrapper w : Wrapper.values()) {
if (w == Wrapper.VOID) continue; // skip this; no unboxed form
if (w == Wrapper.OBJECT) continue; // skip this; already unboxed
for (int n = -5; n < 10; n++) {
Object box = w.wrap(n);
MethodHandle boxer = ValueConversions.boxExact(w);
Object expResult = box;
Object result = null;
switch (w) {
case INT: result = (Integer) boxer.invokeExact(/*int*/n); break;
case LONG: result = (Long) boxer.invokeExact((long)n); break;
case FLOAT: result = (Float) boxer.invokeExact((float)n); break;
case DOUBLE: result = (Double) boxer.invokeExact((double)n); break;
case CHAR: result = (Character) boxer.invokeExact((char)n); break;
case BYTE: result = (Byte) boxer.invokeExact((byte)n); break;
case SHORT: result = (Short) boxer.invokeExact((short)n); break;
case BOOLEAN: result = (Boolean) boxer.invokeExact((n & 1) != 0); break;
}
assertEquals("(dst,src,n,box)="+Arrays.asList(w,w,n,box),
expResult, result);
}
}
}
示例4: testConvert
import sun.invoke.util.Wrapper; //导入方法依赖的package包/类
static void testConvert(Wrapper src, Wrapper dst, long tval) throws Throwable {
if (dst == Wrapper.OBJECT || src == Wrapper.OBJECT) return; // must have prims
if (dst == Wrapper.VOID || src == Wrapper.VOID ) return; // must have values
boolean testSingleCase = (tval != 0);
final long tvalInit = tval;
MethodHandle conv = ValueConversions.convertPrimitive(src, dst);
MethodType convType = MethodType.methodType(dst.primitiveType(), src.primitiveType());
assertEquals(convType, conv.type());
MethodHandle converter = conv.asType(conv.type().changeReturnType(Object.class));
for (;;) {
long n = tval;
Object testValue = src.wrap(n);
Object expResult = dst.cast(testValue, dst.primitiveType());
Object result;
switch (src) {
case INT: result = converter.invokeExact((int)n); break;
case LONG: result = converter.invokeExact(/*long*/n); break;
case FLOAT: result = converter.invokeExact((float)n); break;
case DOUBLE: result = converter.invokeExact((double)n); break;
case CHAR: result = converter.invokeExact((char)n); break;
case BYTE: result = converter.invokeExact((byte)n); break;
case SHORT: result = converter.invokeExact((short)n); break;
case BOOLEAN: result = converter.invokeExact((n & 1) != 0); break;
default: throw new AssertionError();
}
assertEquals("(src,dst,n,testValue)="+Arrays.asList(src,dst,"0x"+Long.toHexString(n),testValue),
expResult, result);
if (testSingleCase) break;
// next test value:
tval = nextTestValue(tval);
if (tval == tvalInit) break; // repeat
}
}
示例5: testUnbox
import sun.invoke.util.Wrapper; //导入方法依赖的package包/类
private void testUnbox(boolean doCast, Wrapper dst, Wrapper src) throws Throwable {
boolean expectThrow = !doCast && !dst.isConvertibleFrom(src);
if (dst == Wrapper.OBJECT || src == Wrapper.OBJECT) return; // must have prims
if (dst == Wrapper.VOID || src == Wrapper.VOID ) return; // must have values
if (dst == Wrapper.OBJECT)
expectThrow = false; // everything (even VOID==null here) converts to OBJECT
try {
for (int n = -5; n < 10; n++) {
Object box = src.wrap(n);
switch (src) {
case VOID: assertEquals(box, null); break;
case OBJECT: box = box.toString(); break;
case SHORT: assertEquals(box.getClass(), Short.class); break;
default: assertEquals(box.getClass(), src.wrapperType()); break;
}
MethodHandle unboxer;
if (doCast)
unboxer = ValueConversions.unboxCast(dst);
else
unboxer = ValueConversions.unboxWiden(dst);
Object expResult = (box == null) ? dst.zero() : dst.wrap(box);
Object result = null;
switch (dst) {
case INT: result = (int) unboxer.invokeExact(box); break;
case LONG: result = (long) unboxer.invokeExact(box); break;
case FLOAT: result = (float) unboxer.invokeExact(box); break;
case DOUBLE: result = (double) unboxer.invokeExact(box); break;
case CHAR: result = (char) unboxer.invokeExact(box); break;
case BYTE: result = (byte) unboxer.invokeExact(box); break;
case SHORT: result = (short) unboxer.invokeExact(box); break;
case BOOLEAN: result = (boolean) unboxer.invokeExact(box); break;
}
if (expectThrow) {
expResult = "(need an exception)";
}
assertEquals("(doCast,expectThrow,dst,src,n,box)="+Arrays.asList(doCast,expectThrow,dst,src,n,box),
expResult, result);
}
} catch (RuntimeException ex) {
if (expectThrow) return;
System.out.println("Unexpected throw for (doCast,expectThrow,dst,src)="+Arrays.asList(doCast,expectThrow,dst,src));
throw ex;
}
}