swing - java threading control / concurrent operation -

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i have created control in java. allows user download file. user can download list of files @ once. there program must load controls , start @ least 4 of them. want 4 operations run concurrently. far can 1 run @ time. how achieve this?

public class download extends java.awt.panel implements runnable

i have looked @ threading can mod make thread? or better way? note looked @ threading , confused in c# have used background process. learning java in netbeans ide.


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