Java by API/java.lang/Long
Содержание
- 1 Long: byteValue()
- 2 long.class
- 3 Long: doubleValue()
- 4 Long: floatValue()
- 5 Long: intValue()
- 6 Long: longValue()
- 7 Long.MAX_VALUE
- 8 Long.MIN_VALUE
- 9 Long: parseLong(String s, int radix)
- 10 Long: shortValue()
- 11 Long: toHexString(long i)
- 12 Long: toString(long i, int radix)
- 13 Long: valueOf(String stringValue)
- 14 new Long(long value)
- 15 new Long(String s)
Long: byteValue()
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
long.class
<source lang="java">
import java.lang.reflect.Method; /**
* Demonstrates how to get specific method information. * * @author * @version $Revision: 1.3 $ */
public class SpecificMethodInfoDemo {
public static void main(final String[] args) {
final Method byteValueMeth;
final Method waitMeth;
final Method waitDetailMeth;
try {
byteValueMeth = Number.class.getMethod("byteValue", null);
waitMeth = Number.class.getMethod("wait", new Class[] {});
waitDetailMeth = Number.class.getMethod("wait", new Class[] { long.class, int.class });
} catch (final NoSuchMethodException ex) {
throw new RuntimeException(ex);
}
System.out.println("byteValueMeth = " + byteValueMeth.toString());
System.out.println("waitMeth = " + waitMeth.toString());
System.out.println("waitDetailMeth = " + waitDetailMeth.toString());
}
} /* ########## End of File ########## */
</source>
Long: doubleValue()
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
Long: floatValue()
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
Long: intValue()
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
Long: longValue()
<source lang="java">
public class Main {
public static void main(String args[]) {
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("FALSE");
System.out.println(b1.toString() + " or " + b2.toString());
for (int j = 0; j < 16; ++j)
System.out.print(Character.forDigit(j, 16));
Integer i = new Integer(Integer.parseInt("ef", 16));
Long l = new Long(Long.parseLong("abcd", 16));
long m = l.longValue() * i.longValue();
System.out.println(Long.toString(m, 8));
}
}
</source>
Long.MAX_VALUE
<source lang="java">
public class Main {
public static void main(String[] args) {
System.out.println(Long.MIN_VALUE);
System.out.println(Long.MAX_VALUE);
}
} /* -9223372036854775808 9223372036854775807
- /
</source>
Long.MIN_VALUE
<source lang="java">
public class Main {
public static void main(String[] args) {
System.out.println(Long.MIN_VALUE);
System.out.println(Long.MAX_VALUE);
}
} /* -9223372036854775808 9223372036854775807
- /
</source>
Long: parseLong(String s, int radix)
<source lang="java">
public class Main {
public static void main(String args[]) {
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("FALSE");
System.out.println(b1.toString() + " or " + b2.toString());
for (int j = 0; j < 16; ++j)
System.out.print(Character.forDigit(j, 16));
Integer i = new Integer(Integer.parseInt("ef", 16));
Long l = new Long(Long.parseLong("abcd", 16));
long m = l.longValue() * i.longValue();
System.out.println(Long.toString(m, 8));
}
}
</source>
Long: shortValue()
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
Long: toHexString(long i)
<source lang="java">
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002. * All rights reserved. Software written by Ian F. Darwin and others. * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS"" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee * cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s, * pioneering role in inventing and promulgating (and standardizing) the Java * language and environment is gratefully acknowledged. * * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for * inventing predecessor languages C and C++ is also gratefully acknowledged. */
/** When does the UNIX date get into trouble? */ public class Main {
public static void main(String[] a) {
// This should yield 2038AD, the hour of doom for the
// last remaining 32-bit UNIX systems (there will be
// millions of 64-bit UNIXes by then).
long expiry = 0x7FFFFFFFL;
System.out.println("32-bit UNIX expires on " + Long.toHexString(expiry)
+ " or " + new java.util.Date(expiry * 1000));
}
}
</source>
Long: toString(long i, int radix)
<source lang="java">
public class Main {
public static void main(String args[]) {
Boolean b1 = new Boolean("TRUE");
Boolean b2 = new Boolean("FALSE");
System.out.println(b1.toString() + " or " + b2.toString());
for (int j = 0; j < 16; ++j)
System.out.print(Character.forDigit(j, 16));
Integer i = new Integer(Integer.parseInt("ef", 16));
Long l = new Long(Long.parseLong("abcd", 16));
long m = l.longValue() * i.longValue();
System.out.println(Long.toString(m, 8));
}
}
</source>
Long: valueOf(String stringValue)
<source lang="java">
/*
* Output:
true c 12 2 13245 12341234 11234.123 4.321324123412341E10
*/
public class MainClass {
public static void main(String args[]) {
Boolean bool = Boolean.valueOf("true");
Character c = new Character("c");
Byte b = Byte.valueOf("12");
Short s = Short.valueOf("2");
Integer i = Integer.valueOf("13245");
Long l = Long.valueOf("12341234");
Float f = Float.valueOf("11234.1234");
Double d = Double.valueOf("43213241234.123412341234");
System.out.println(bool);
System.out.println(c);
System.out.println(b);
System.out.println(s);
System.out.println(i);
System.out.println(l);
System.out.println(f);
System.out.println(d);
}
}
</source>
new Long(long value)
<source lang="java">
public class Main {
public static void main(String[] args) {
long i = 10;
Long lObj = new Long(i);
System.out.println(lObj);
}
}
</source>
new Long(String s)
<source lang="java">
public class Main {
public static void main(String[] args) {
Long lObj = new Long("10");
byte b = lObj.byteValue();
System.out.println(b);
short s = lObj.shortValue();
System.out.println(s);
int i = lObj.intValue();
System.out.println(i);
float f = lObj.floatValue();
System.out.println(f);
double d = lObj.doubleValue();
System.out.println(d);
}
}
</source>
