Java获取cpu和内存相关参数_java获取内存信息

        在Java中，可以使用java.lang.management包中的ManagementFactory类来获取与CPU和内存相关的参数。

1.获取CPU核心数：

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
 
public class CpuInfoExample {
    public static void main(String[] args) {
        OperatingSystemMXBean osBean = ManagementFactory.getOperatingSystemMXBean();
        int cpuCores = osBean.getAvailableProcessors();
        System.out.println("Number of CPU cores: " + cpuCores);
    }
}

          使用ManagementFactory.getOperatingSystemMXBean()方法获取                      OperatingSystemMXBean对象，然后调用getAvailableProcessors()方法获取CPU的核心数。

2.获取内存相关信息：

import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
 
public class MemoryInfoExample {
    public static void main(String[] args) {
        MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
        MemoryUsage heapMemoryUsage = memoryBean.getHeapMemoryUsage();
        MemoryUsage nonHeapMemoryUsage = memoryBean.getNonHeapMemoryUsage();
        
        System.out.println("Heap Memory:");
        System.out.println("    Init: " + heapMemoryUsage.getInit());
        System.out.println("    Used: " + heapMemoryUsage.getUsed());
        System.out.println("    Max: " + heapMemoryUsage.getMax());
        System.out.println("    Committed: " + heapMemoryUsage.getCommitted());
        
        System.out.println("Non-Heap Memory:");
        System.out.println("    Init: " + nonHeapMemoryUsage.getInit());
        System.out.println("    Used: " + nonHeapMemoryUsage.getUsed());
        System.out.println("    Max: " + nonHeapMemoryUsage.getMax());
        System.out.println("    Committed: " + nonHeapMemoryUsage.getCommitted());
    }
}

        使用ManagementFactory.getMemoryMXBean()方法获取MemoryMXBean对象，然后通过getHeapMemoryUsage()和getNonHeapMemoryUsage()方法分别获取堆和非堆内存使用情况。然后，使用MemoryUsage对象的不同方法获取有关内存的不同信息，比如初始大小（getInit()）、已使用大小（getUsed()）、最大大小（getMax()）和已提交大小（getCommitted()）等。

以上示例代码演示了如何使用Java来获取CPU核心数和内存的相关参数。请注意，这些参数的具体获取方式可能因操作系统或Java版本而有所不同。