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Re:如何为我的异常类加上 "return type"? [Re:chuxueaihaozhe]

chuxueaihaozhe

发贴: 26
积分: 0

于 2005-07-17 23:24

C:\myclass> echo %JAVA_HOME%
%JAVA_HOME%

C:\myclass> echo %PATH%
C:\j2sdk1.4.2\bin;C:\WINNT\AcGe16.dll;C:\Program Files\Common Files\Autodesk Shared\;C:\Program Files\backburner 2\

C:\myclass> echo %CLASSPATH%
.;C:\j2sdk1.4.2\lib\dt.jar;C:\j2sdk1.4.2\lib\tools.jar;C:\j2sdk1.4.2\jre\lib\rt.jar;C:\j2sdk1.4.2\jre\lib\charsets.jar;C:\j2sdk1.4.2\jre\lib\jaws.jar;C:\j2sdk1.4.2\lib\msbase.jar;C:\j2sdk1.4.2\lib\mssqlserver.jar;C:\j2sdk1.4.2lib\msutil.jar;C:\j2sdk1.4.2\lib\classes12.jar

C:\myclass> dir
驱动器c中的卷是DISK1_VOL1
卷的序列号0672-82C6
C:\myclass的目录
05/01/2005 09:31p <DIR> .
05/01/2005 09:31p <DIR> ..
07/14/2005 05:22P 1,089 NewPrimeFinder.java
* * * *
34个文件 20,017字节
2个目录 ***可用字节

C:\myclass>type NewPrimeFinder.java
public class NewPrimeFinder implements Runnable {
public long target;
public long prime;
public boolean finished = false;
private Thread runner;

NewPrimeFinder(long inTarget) throws NegativeNumberException {
if (inTarget < 0) {
NegativeNumberException nne = new NegativeNumberException(
"Negative numbers not allowed: " + inTarget);
throw nne;
}
target = inTarget;
if (runner == null) {
runner = new Thread(this);
runner.start();
}
}

public void run() {
long numPrimes = 0;
long candidate = 2;
while (numPrimes < target) {
if (isPrime(candidate)) {
numPrimes++;
prime = candidate;
}
candidate++;
}
finished = true;
}

boolean isPrime(long checkNumber) {
double root = Math.sqrt(checkNumber);
for (int i = 2; i <= root; i++) {
if (checkNumber % i == 0)
return false;
}
return true;
}
}

class NegativeNumberException extends Exception {
NegativeNumberException() {
super();
}
NegativeNumberException(String message) {
super(message);
}
}

C:myclass> javac NewPrimeFinder.java
C:\>javac NewPrimeFinder.java
NewPrimeFinder.java:44:invalid method declaration;return type required
NegativeNumberException()
^
NewPrimeFinder.java:47:invalid method declaration;return type required
NegativeNumberException(String message)
^
2 errors

话题树型展开

人气	标题	作者	字数	发贴时间
5965	如何为我的异常类加上 "return type"?	chuxueaihaozhe	1678	2005-07-10 23:01
4800	Re:如何为我的异常类加上 "return type"?	why	103	2005-07-11 00:11
4941	Re:如何为我的异常类加上 "return type"?	chuxueaihaozhe	261	2005-07-11 21:26
4882	Re:如何为我的异常类加上 "return type"?	heart5	327	2005-07-15 07:46
4875	Re:如何为我的异常类加上 "return type"?	chuxueaihaozhe	64	2005-07-15 21:13
4746	Re:如何为我的异常类加上 "return type"?	why	409	2005-07-15 23:16
5167	Re:如何为我的异常类加上 "return type"?	chuxueaihaozhe	2387	2005-07-17 23:24

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