java - Cannot find symbol: Thread.sleep (1000); -

java - Cannot find symbol: Thread.sleep (1000); -

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java -the method sleep(int) undefined type thread 7 answers

i want implement threads using runnable interface.

i have next 3 classes:

firstthread.java

public class firstthread implements runnable { //this method executed when thread executed public void run() { //looping 1 10 display numbers 1 10 ( int i=1; i<=10; i++) { //displaying numbers thread system.out.println( "messag first thread : " +i); /*taking delay of 1 sec before displaying next number * * "thread.sleep(1000);" - when statement executed, * thread sleep 1000 milliseconds (1 second) * before executing next statement. * * since making thread sleep 1 second, * need handle "interruptedexception". our thread * may throw exception if interrupted while * sleeping. * */ seek { thread.sleep (1000); } grab (interruptedexception interruptedexception) { /*interrupted exception thrown when sleeping or waiting *thread interrupted. */ system.out.println( "first thread interrupted when sleeping" +interruptedexception); } } } }

secondthread.java:

public class secondthread implements runnable { //this method executed when thread executed public void run() { //looping 1 10 display numbers 1 10 ( int i=1; i<=10; i++) { system.out.println( "messag sec thread : " +i); /*taking delay of 1 sec before displaying next number * * "thread.sleep(1000);" - when statement executed, * thread sleep 1000 milliseconds (1 second) * before executing next statement. * * since making thread sleep 1 second, * need handle "interruptedexception". our thread * may throw exception if interrupted while * sleeping. */ seek { thread.sleep(1000); } grab (interruptedexception interruptedexception) { /*interrupted exception thrown when sleeping or waiting * thread interrupted. */ system.out.println( "second thread interrupted when sleeping" +interruptedexception); } } } }

threaddemo.java:

public class threaddemo { public static void main(string args[]) { //creating object of first thread firstthread firstthread = new firstthread(); //creating object of sec thread secondthread secondthread = new secondthread(); //starting first thread thread thread1 = new thread(firstthread); thread1.start(); //starting sec thread thread thread2 = new thread(secondthread); thread2.start(); } }

on compiling above programs, got next errors:

firstthread

class="lang-none prettyprint-override">shahjahan@shahjahan-aod270:~/documents/java$ javac firstthread.java firstthread.java:28: error: cannot find symbol thread.sleep (1000); ^ symbol: method sleep(int) location: class thread 1 error

secondthread:

class="lang-none prettyprint-override"> shahjahan@shahjahan-aod270:~/documents/java$ javac secondthread.java secondthread.java:26: error: cannot find symbol thread.sleep(1000); ^ symbol: method sleep(int) location: class thread 1 error

threaddemo:

class="lang-none prettyprint-override">shahjahan@shahjahan-aod270:~/documents/java$ javac threaddemo.java threaddemo.java:12: error: constructor thread in class thread cannot applied given types; thread thread1 = new thread(firstthread); ^ required: no arguments found: firstthread reason: actual , formal argument lists differ in length threaddemo.java:13: error: cannot find symbol thread1.start(); ^ symbol: method start() location: variable thread1 of type thread threaddemo.java:16: error: constructor thread in class thread cannot applied given types; thread thread2 = new thread(secondthread); ^ required: no arguments found: secondthread reason: actual , formal argument lists differ in length threaddemo.java:17: error: cannot find symbol thread2.start(); ^ symbol: method start() location: variable thread2 of type thread ./firstthread.java:28: error: cannot find symbol thread.sleep (1000); ^ symbol: method sleep(int) location: class thread ./secondthread.java:26: error: cannot find symbol thread.sleep(1000); ^ symbol: method sleep(int) location: class thread 6 errors

i novice in java. why thread.sleep not working. thread implementation depends on machine on compiled?

either importing class name thread, not java.lang.thread, or there class called thread in current code directory 'polluting' imports class.

remove/rename classes called 'thread' in folder, , remove imports class called thread

java multithreading