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回复：求助计算器应用程序算了，还是直接给你吧：importJava.Applet.*;importjava.awt.*;importjava.awt.event.*;importjava.lang.*;importjava.applet.Applet;importjavax.Swing.*;importjavax.swing.border.*;publicclassCalculatorextendsJAppletimplementsActionListener{privatefinalString[]KEYS={"7","8","9","/","sqrt","4","5","6","*","%","1","2","3","-","1/x","0","+/-",".","+","="};privatefinalString[]COMMAND={"Backspace","CE","C"};privatefinalString[]M={"","MC","MR","MS","M+"};privateJButtonkeys[]=newJButton[KEYS.length];privateJButtoncommands[]=newJB