i change the value into the 0 but still they give me the error
时间: 2024-05-19 17:11:38 浏览: 8
If changing the value to 0 didn't solve the error, there could be other factors causing the problem. Can you provide more context and details about the error message and the code you are working on? This will help me better understand the issue and provide more specific advice to help you resolve the problem.
相关问题
give me command to change the source
你可以使用以下命令更改ROS依赖项源:
1. 更改ROS依赖项源的URL为其他可靠的源,或者使用本地镜像源:
```
sudo sh -c 'echo "yaml file://$ROS_HOME/rosdep/base.yaml" > /etc/ros/rosdep/sources.list.d/20-default.list'
```
```
sudo sh -c 'echo "yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml" > /etc/ros/rosdep/sources.list.d/20-default.list'
```
```
sudo sh -c 'echo "yaml https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml" > /etc/ros/rosdep/sources.list.d/20-default.list'
```
```
sudo sh -c 'echo "yaml file:///path/to/local/mirror" > /etc/ros/rosdep/sources.list.d/20-default.list'
```
注意:将`/path/to/local/mirror`更改为本地镜像源的路径。
2. 更新ROS依赖项源:
```
sudo rosdep update
```
现在,你已经成功更改了ROS依赖项源。请记住,更改ROS依赖项源可能会导致依赖项安装失败或出现其他问题,因此确保使用可靠的源并仔细测试安装过程。
Change the ArrayList into TreeSet.
Sure, here's an example of how to change an ArrayList into a TreeSet:
```
import java.util.ArrayList;
import java.util.TreeSet;
public class Example {
public static void main(String[] args) {
ArrayList<Integer> arrayList = new ArrayList<>();
arrayList.add(5);
arrayList.add(2);
arrayList.add(8);
arrayList.add(1);
arrayList.add(9);
// Convert the ArrayList to a TreeSet
TreeSet<Integer> treeSet = new TreeSet<>(arrayList);
// Print the TreeSet
System.out.println(treeSet);
}
}
```
In this example, we first create an ArrayList of integers. We then create a TreeSet and pass the ArrayList to its constructor. This automatically creates a sorted set with the elements of the ArrayList. Finally, we print the TreeSet to verify that it is sorted.
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