《java編程語言原理與范例》課后實驗源代碼

1、第一章實驗一packagech01imptjava.text.SimpleDateFmatimptjava.util.DateclassTimerextendsThreadprivateSimpleDateFmatsdf=newSimpleDateFmat(“yyyy年MM月dd日HH:mm:ss“)publicvoidrun()while(true)System.out.print(“r現在時間是：“)Datenow=newDate(

2、)System.out.print(sdf.fmat(now))trysleep(1000)catch(InterruptedExceptione)e.printStackTrace()publicclassClockpublicstaticvoidmain(String[]args)Timertimer=newTimer()timer.start()實驗二packagech01imptjava.awt.event.MouseAdapt

3、erimptjava.awt.event.MouseEventimptjava.util.Romimptjavax.swing.JButtonimptjavax.swing.JFramepublicclassMagicButtonextendsMouseAdapterJFramewinJButtonbutton=newJButton(“你點不到我“)Romr=newRom()第二章實驗一2.交換兩個變量的值（不允許使用中間變量）。pac

4、kagech03publicclassExp2_2publicstaticvoidmain(String[]args)inta=2b=3ints=aba=sab=saSystem.out.println(“a=“a“b=“b)實驗二3.逆序輸出一個7位整數，如8639427輸出為7249368（不允許使用循環(huán)語句）。packagech03publicclassExp2_3publicstaticvoidmain(String[]args

5、)longa=8639427System.out.print(a%10)System.out.print(a10%10)System.out.print(a100%10)System.out.print(a1000%10)System.out.print(a10000%10)System.out.print(a100000%10)System.out.print(a1000000%10)實驗三4.對于int型變量a，以最快的速度計算34