The example illustrates various features of the class System

// the program illustrates using the System class
import java.io.*; // since we are playing with input/output

public class SystemTest {

    public static void main(String [] args) throws IOException {
	MyObject mo = new MyObject(5);
	if (2 < 3) {
	    MyObject mo1 = new MyObject(2);
	} 
	aMethod();
	// calling the garbage-collector:
	// System.gc(); 

	// Other system methods:
	String javaVersion = System.getProperty("java.version");
	System.out.println(javaVersion);
	String  username = System.getProperty("user.name");
	System.out.println(username);
	String osname = System.getProperty("os.name");
	System.out.println(osname);

	// Setting the output
	System.setOut(new PrintStream(new FileOutputStream("new.txt")));
	System.out.println("Hi there!");	      
    }

    private static void aMethod() {
	MyObject mo = new MyObject(3);
	System.out.println(mo.toString());
    }
}

class MyObject {
    private int n;

    public MyObject(int x) {
	n = x;
    }

    public String toString() {
	return "MyObject: " + n;
    }

    protected void finalize() {
	System.out.println(toString() + " is being garbage-collected");
    }
}


This is an example from CSci 1211 course.

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