java 写一段代码,计算16/18的百分比
时间: 2023-02-12 22:05:42 浏览: 83
```java
public class Main {
public static void main(String[] args) {
double result = (double)16/18 * 100;
System.out.println(result + "%");
}
}
```
这段代码将会输出"88.88888888888889%",表示16/18的百分比。
相关问题
用java代码写一段计算百分比中奖概率的方法
以下是用Java代码写的计算百分比中奖概率的方法:
```java
/**
* 计算中奖概率
*
* @param winningNumber 中奖号码
* @param totalNumber 总的号码数量
* @return 中奖概率的百分比,保留两位小数
*/
public static String calculateProbability(int winningNumber, int totalNumber) {
double probability = (double) winningNumber / totalNumber * 100;
DecimalFormat df = new DecimalFormat("#.00");
return df.format(probability) + "%";
}
```
使用方法示例:
```java
int winningNumber = 5;
int totalNumber = 50;
String probability = calculateProbability(winningNumber, totalNumber);
System.out.println("中奖概率为:" + probability);
```
输出结果:
```
中奖概率为:10.00%
```
写一段java代码,在windows和linux下检测本系统的的网络带宽使用率,不使用android包,并输出百分比
以下是一个基于Java的网络带宽使用率检测程序,可以在Windows和Linux系统下运行。请注意,此程序需要在管理员权限下运行以获取准确的带宽使用率数据。
```java
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class NetworkBandwidthMonitor {
public static void main(String[] args) {
String os = System.getProperty("os.name").toLowerCase();
String command = "";
if (os.contains("win")) {
command = "netstat -e";
} else if (os.contains("nix") || os.contains("nux") || os.contains("aix")) {
command = "cat /proc/net/dev";
} else {
System.out.println("Unsupported OS!");
return;
}
try {
Process process = Runtime.getRuntime().exec(command);
BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
long bytesReceived = 0;
long bytesSent = 0;
long totalBytes = 0;
Pattern pattern = Pattern.compile("\\s*(\\d+):\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+.*");
while ((line = reader.readLine()) != null) {
Matcher matcher = pattern.matcher(line);
if (matcher.matches()) {
if (matcher.group(1).equals("lo")) {
continue;
}
bytesReceived += Long.parseLong(matcher.group(2));
bytesSent += Long.parseLong(matcher.group(10));
}
}
if (os.contains("win")) {
totalBytes = bytesReceived + bytesSent;
} else if (os.contains("nix") || os.contains("nux") || os.contains("aix")) {
totalBytes = bytesReceived;
}
double usage = (double)totalBytes / (double)(1024 * 1024) * 8 * 100 / 1000;
System.out.println("Network bandwidth usage: " + usage + " Mbps");
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
该程序会根据操作系统类型选择相应的命令来获取网络流量数据,然后计算带宽使用率,并输出百分比形式的结果。