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Java Exercises: Display the system time

Java Basic: Exercise-46 with Solution

Write a Java program to display the system time.

Pictorial Presentation:

Java: Display the system time

Sample Solution:

Java Code:

public class Exercise46 {
  
  public static void main(String[] args){
         System.out.format("\nCurrent Date time: %tc%n\n", System.currentTimeMillis());
    }
}

Sample Output: 

Current Date time: Fri Jun 16 14:17:40 IST 2017

Flowchart:

Flowchart: Java exercises: Display the system time

Java Code Editor:

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Java: Tips of the Day

Execution of console commands:

Java allows you to execute console commands directly from code using a class Runtime. It is very important not to forget about exception handling.

For example, let's try to open a PDF file through a Java terminal:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
  
public class ShellCommandExec {
  
  public static void main(String[] args) {
    String gnomeOpenCommand = "gnome-open //home//user//Documents//MyDoc.pdf";
  
    try {
      Runtime rt = Runtime.getRuntime();
      Process processObj = rt.exec(gnomeOpenCommand);
  
      InputStream stdin = processObj.getErrorStream();
      InputStreamReader isr = new InputStreamReader(stdin);
      BufferedReader br = new BufferedReader(isr);
  
      String myoutput = "";
  
      while ((myoutput=br.readLine()) != null) {
        myoutput = myoutput+"\n";
      }
      System.out.println(myoutput);
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}