Percentage:70 - CommandA Data:Previous/New(80/20) User:true/false(50/50)
Percentage:30 - CommandB Data:Previous/New(50/50) User:true/false(30/70)
上面是我的文本文件,其中我70%的时间打印CommandA,而30%的时间来自我在下面写的逻辑,从StackOverflow获取建议。现在我想要的是,如果CommandA在70%的时间内被打印,那么在70美元时间的80%,它也应该打印上一次和20%的70%的时间它应该打印新的。同样,它应该打印70%的时间中的50%为真,50%的时间为假。 所以基本上问题就像这样 - 问题陈述
70%的时间打印“CommandA”,70%打印80%打印 “上一页”并打印20%“新”。而那些70%的印数50%“真实” 并且打印50%“false”同样,对于CommandB打印“CommandB”的30% 时间,并在那些30%打印50%“上一页”和打印50%“新”。 其中30%打印30%“真实”并打印70%“假”
所以目前在我的下面代码中我打印了70%的CommandA和30%的CommandB。我不确定如何添加上述要求的代码。
public static void main(String[] args) {
commands = new LinkedList<Command>();
values = new ArrayList<String>();
br = new BufferedReader(new FileReader("S:\\Testing\\Test2.txt"));
while ((sCurrentLine = br.readLine()) != null) {
percentage = sCurrentLine.split("-")[0].split(":")[1].trim();
values = Arrays.asList(sCurrentLine.split("-")[1].trim().split("\\s+"));
for(String s : values) {
if(s.contains("Data:")) {
// Here data contains **Previous/New(80/20)**
data = s.split(":")[1];
} else if(s.contains("User:")) {
// Here userLogged contains **true/false(50/50)**
userLogged = s.split(":")[1];
} else {
cmdName = s;
}
}
Command command = new Command();
command.setName(cmdName);
command.setExecutionPercentage(Double.parseDouble(percentage));
command.setDataCriteria(data);
command.setUserLogging(userLogged);
commands.add(command);
}
executedFrequency = new Long[commands.size()];
for (int i=0; i < commands.size(); i++) {
executedFrequency[i] = 0L;
}
for(int i = 1; i < 10000; i++) {
Command nextCommand = getNextCommandToExecute();
// So by my logic each command is being printed specified number of percentage times
System.out.println(nextCommand.getName());
/*
* What I want is that if Command A is executed 70% of time, then according
* to properties file 80% times of 70% of CommandA it should print Previous
* and 20% times of 70% of CommandA it should print New Likewise same thing
* for User. It should print 50% times of 70% of CommandA true and 50% to false.
*
*/
}
}
}
// Get the next command to execute based on percentages
private static Command getNextCommandToExecute() {
int commandWithMaxNegativeOffset = 0; // To initiate, assume the first one has the max negative offset
if (totalExecuted != 0) {
// Manipulate that who has max negative offset from its desired execution
double executedPercentage = ((double)executedFrequency[commandWithMaxNegativeOffset] / (double)totalExecuted) * 100;
double offsetOfCommandWithMaxNegative = executedPercentage - commands.get(commandWithMaxNegativeOffset).getExecutionPercentage();
for (int j=1; j < commands.size(); j++) {
double executedPercentageOfCurrentCommand = ((double)executedFrequency[j] / (double)totalExecuted) * 100;
double offsetOfCurrentCommand = executedPercentageOfCurrentCommand - commands.get(j).getExecutionPercentage();
if (offsetOfCurrentCommand < offsetOfCommandWithMaxNegative) {
offsetOfCommandWithMaxNegative = offsetOfCurrentCommand;
commandWithMaxNegativeOffset = j;
}
}
}
// Next command to execute is the one with max negative offset
executedFrequency[commandWithMaxNegativeOffset] ++;
totalExecuted ++;
return commands.get(commandWithMaxNegativeOffset);
}
P.S。我为执行百分比写的逻辑来自我在stackoverflow上发布的帖子。
答案 0 :(得分:1)
您可以使用java.util.Random
类生成随机数。 Random.nextDouble()
方法返回0到1之间的值,因此如果将其乘以100,则得到百分比。然后将该数字与命令所需的百分比进行比较(例如,CommandA
为70)
由于您知道命令所需的百分比,因此您可以生成另一个随机数,也可以使用刚生成的随机数来选择命令。
生成一个新号码 :(参见上面的代数),然后您可以将百分比与所需的二级分布进行比较(例如,Previous
为80)
重复使用相同的数字:计算命令选择阈值的相应部分,并将数字与数字进行比较。例如。对于CommandA
,阈值为70.假设您生成了69(小于70,因此选择了CommandA
)。所以你计算70 * 80%= 56。 69大于此值,因此您选择New
(而不是Previous
)
注意:即使你保留了当前选择命令的逻辑,你也可以接近1)
更新:代码示例:
Random rnd = new Random();
double percent = rnd.getNextDouble()*100;
for (Command c : commands) {
if (percent < c.getExecutionPercentage()) {
// we select the current command
percent = rnd.getNextDouble()*100;
if (percent < command.getDataCriteria().getPreviousPercentage()) {
// we select Previous
} else {
// we select New
}
break;
} else {
percent -= c.getExecutionPercentage();
}
}
注意:上面的代码假设所有Command
s getExecutionPercentage()
的总和是(至少)100
更新:制作Random
对象,因为方法不是静态的