Question

java进度条怎么应用呢?怎样才能将进度条的进度与程序的进度联系起来?

比如说：给一个复制文件的小程序加个一个进度条，文件复制完成之后直接弹出复制成功。

Answer 1

给你给程序你看看吧！一看就会懂得
import javax.swing.*;
import java.awt.*;
import javax.swing.border.*;
public class Example10_17{
public static void main(String args[]){
new BarWin();
}
}
class BarWin extends JFrame implements Runnable{
JProgressBar pbar1,pbar2;
Thread thread1,thread2;
JTextField text1,text2;
int number=50;
BarWin(){
pbar1=new JProgressBar(0,number);
pbar2=new JProgressBar(0,number);
pbar1.setStringPainted(true);
pbar2.setStringPainted(true);
text1=new JTextField(10);
text2=new JTextField(10);
thread1=new Thread(this);
thread2=new Thread(this);
Box boxV1=Box.createVerticalBox();
boxV1.add(pbar1);
boxV1.add(pbar2);
Box boxV2=Box.createVerticalBox();
boxV2.add(text1);
boxV2.add(text2);
Box baseBox=Box.createHorizontalBox();
baseBox.add(boxV1);
baseBox.add(boxV2);
setLayout(new FlowLayout());
add(baseBox);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(10,10,300,300);
setVisible(true);
thread1.start();
thread2.start();
}
public void run(){
if(Thread.currentThread()==thread1){
for(int i=1;i<=number;i++){
text1.setText("第"+i+"项="+f(i));
pbar1.setValue(i);
try{ Thread.sleep(500);
}
catch(InterruptedException e){}
}
}
if(Thread.currentThread()==thread2){
long a1=1,a2=1,a=a1;
int i=1;
while(i<=number){
if(i>=3){
a=a1+a2;
a1=a2;
a2=a;
}
text2.setText("第"+i+"项="+a);
pbar2.setValue(i);
i++;
try{ Thread.sleep(500);
}
catch(InterruptedException e){}
}
}
}
long f(int n){
long c=0;
if(n==1||n==2)
c=1;
else if(n>1)
c=f(n-1)+f(n-2);
return c;
}
}