Note: D:\Study\Java\Thinking in Java 2nd 11 rev (code)\c09\SimpleCollection.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.第一次出现的时候试着用javac -nowarn 调过去了,这一次过不去,老是出现usage:的提示
请问是怎么回事呢?我第一次学java
Note: Recompile with -Xlint:unchecked for details.第一次出现的时候试着用javac -nowarn 调过去了,这一次过不去,老是出现usage:的提示
请问是怎么回事呢?我第一次学java
重新开启java文件,重新编译(用-nowarn参数),然后java $File就没问题了
烦请高手解释一下
下面是源代码
//: c09:SimpleCollection.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// A simple example using Java 2 Collections.
import java.util.*;public class SimpleCollection {
public static void main(String[] args) {
// Upcast because we just want to
// work with Collection features
Collection c = new ArrayList(); for(int i = 0; i < 10; i++)
c.add(Integer.toString(i));
Iterator it = c.iterator();
while(it.hasNext())
System.out.println(it.next());
}
} ///:~
应该不是程序的问题,楼主应该想想环境或者配置的问题。测试环境:
系统:XP with SP2
IDE: eclipse-SDK-3.0.1
测试结果:
0
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9