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我正在尝试使用秒表类来测量我的代码在ArrayList与LinkedList上运行的速度。当我尝试编译我的代码时,我仍然遇到这个错误。分析int时eclipse中的java.lang.NumberFormatException错误
Exception in thread "main" java.lang.NumberFormatException: For input string: "java"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at SortTest.main(SortTest.java:10)
我的代码如下所示:
import java.util.ArrayList;
import java.util.Collections;
import java.util.Random;
public class SortTest {
public static void main(String[] args) {
final int N = Integer.parseInt(args[0]);
ArrayList<Integer> thelist = new ArrayList();
int x = 1;
while (x < N) {
thelist.add(x);
}
final Random RNG = new Random (Long.getLong("seed", System.nanoTime()));
Collections.shuffle(thelist, RNG);
/////////////
//STOPWATCH//
/////////////
final StopWatch sw = new StopWatch(true);
for (int i = 0; i < 25; i++) {
sw.start();
int smaller = 0;
int smallerindex = 0;
int b = 0;
for(int a = 1; a <thelist.size(); a++) {
smaller = thelist.get(a - 1);
smallerindex = a - 1;
for(b = a; b <thelist.size(); b++) {
if(thelist.get(b) < smaller) {
smaller = thelist.get(b);
smallerindex = b;
}
}
if (smallerindex == a) {
//no action
} else {
int temp = thelist.get(a);
thelist.set(a, thelist.get(smallerindex));
thelist.set(smallerindex, temp);
}
}
sw.stop();
}
final double averageTime = sw.getAverageTime();
System.out.println(averageTime);
}
}
我的命令行输入如下所示:
java -Dseed=4321567 SortTest 200 java.util.ArrayList
我尝试初始化N到0和1,错误不是那里了。只要我将N设置为2,错误就会返回。所以我从中得到的是N> 1有问题。但我不知道是什么导致了错误。帮助将不胜感激。
请考虑接受一些您以前的问题的答案,请。你已经问了8个,已经收到7个答案,但还没有接受任何答案。 – 2015-03-25 00:33:41