線程總是由操作系統佔有和管理，一個新線程的創建和啓動只能由操作系統來負責管理。故不能直接調用該線程的run方法，若如此，則不會創建新的`線程和啓動該線程，而是和其它類對象一樣，那麼應該怎樣正確啓動線程呢?調用線程對象的start方法。當調用Thread對象的start方法時，就會調用一個本地的代碼，該代碼負責是操作系統初始化一個新的線程，並由這個線程類執行Thread對象的run方法。
創建一個線程有兩種方式：其一是繼承Thread類並重載run方法;其二是實現Runnable接口。
第一種方法的代碼如下：
import .*;
import .*;
class ThreadTest {
/**
* Method main
*
*
* @param args
*
*/
public static void main(String[] args) {
// Create three threads
CustomThread first=new CustomThread("Hopalong ","Cassidy ",200l);
CustomThread second=new CustomThread("Marilyn ","Monroe ",300l);
CustomThread third=new CustomThread("Slim ","Pickens ",500l);
tln("Press Enter when you hava had enought...");
t();
t();
t();
try{
();// Wait until Enter key pressed
tln("Enter pressed...");
}
catch(IOException e){// Handle IO Exception
tln(e );// Output the exception
}
tln("Ending main()...");
return;
}
// Inner class
private static class CustomThread extends Thread{
// Constructor
public CustomThread(String firstName,String secondName,long aWhile){
tName=firstName;
ndName=secondName;
le=aWhile;
aemon(true);
}
// override run method
public void run(){
try{
while(true){
sp; tln(tName);
p(aWhile);
tln(ndName);
}
}
catch(InterruptedException e){
tln(firstName+secondName+e);
}
}
// Constants and Variables
private String firstName;
private String secondName;
private long aWhile;
}
}
第二種創建線程的方法代碼如下：
import .*;
import .*;
class ThreadTest1 {
/**
* Method main
* @param args
*/
public static void main(String[] args) {
// Create three threads
Thread first=new Thread(new CustomThread("Hopalong ","Cassidy ",200l));
Thread second=new Thread(new CustomThread("Marilyn ","Monroe ",300l));
Thread third=new Thread(new CustomThread("Slim ","Pickens ",500l));
tln("Press Enter when you hava had enought...");
aemon(true);
aemon(true);
aemon(true);
t();
t();
t();
try{
();// Wait until Enter key pressed
tln("Enter pressed...");
}
catch(IOException e){// Handle IO Exception
tln(e );// Output the exception
}
tln("Ending main()...");
return;
}
// Inner class
Private static class CustomThread implements Runnable{
// Constructor
public CustomThread(String firstName,String secondName,long aWhile){
tName=firstName;
ndName=secondName;
le=aWhile;
}
// override run method
public void run(){
try{
while(true){
tln(tName);
p(aWhile);
tln(ndName);
}
}
catch(InterruptedException e){
tln(firstName+secondName+e);
}
}
// Constants and Variables
private String firstName;
private String secondName;
private long aWhile;
}
}
