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/*
* @由于个人水平有限, 难免有些错误, 还请指点:
* @Author: cpu_code
* @Date: 2020-09-19 15:27:18
* @LastEditTime: 2020-09-19 15:53:17
* @FilePath: \java\IO\io34.java
* @Gitee: [https://gitee.com/cpu_code](https://gitee.com/cpu_code)
* @Github: [https://github.com/CPU-Code](https://github.com/CPU-Code)
* @CSDN: [https://blog.csdn.net/qq_44226094](https://blog.csdn.net/qq_44226094)
* @Gitbook: [https://923992029.gitbook.io/cpucode/](https://923992029.gitbook.io/cpucode/)
*/
package IO;
import java.io.FileNotFoundException;
import java.util.Properties;
import java.util.Set;
public class io34 {
public static void main(String[] args) throws FileNotFoundException {
// 创建属性集对象
Properties properties = new Properties();
// 添加键值对元素
properties.setProperty("cpucode", "520");
properties.setProperty("cpu", "666");
properties.setProperty("hello", "88");
// 打印属性集对象
System.out.println(properties);
// 通过键,获取属性值
System.out.println(properties.getProperty("cpucode"));
System.out.println(properties.getProperty("cpu"));
System.out.println(properties.getProperty("hello"));
// 遍历属性集,获取所有键的集合
Set<String> strings = properties.stringPropertyNames();
// 打印键值对
for (String key : strings) {
System.out.println(key + "--" + properties.getProperty(key));
}
}
}
/*
{cpucode=520, cpu=666, hello=88}
520
666
88
cpucode--520
cpu--666
hello--88
*/