Runtime 类

作用： JAVA 应用 与 运行环境 交互

RuntimeLearn.java

import org.omg.SendingContext.RunTime;

public class RuntimeLearn{
    public static void main(String[] args){

        Runtime rt = Runtime.getRuntime();

        System.out.println( rt.freeMemory()/1024 );

        System.out.println( rt.totalMemory()/1024 );

        System.out.println( rt.maxMemory() );

        System.out.println( rt.availableProcessors() );

    }
}

运行

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