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#javac CheckboxTest.java #java CheckboxTest Warning: Cannot convert string "MetaCtrl<Key>Insert" to type VirtualBinding Exception in thread "main" java.lang.NullPointerException at java.awt.Container.addImpl(Container.java:584) at java.awt.Container.add(Container.java:490) at CheckboxTest.<init>(CheckboxTest.java:17) at CheckboxTest.main(CheckboxTest.java:25) import java.awt.*; import java.awt.event.*; import java.applet.*; public class CheckboxTest extends Frame { Panel p; Checkbox cb1,cb2; TextArea ta; public CheckboxTest() { setLayout(new BorderLayout()); ta = new TextArea(); cb1 = new Checkbox("berry"); cb2 = new Checkbox("apple"); add(p,BorderLayout.NORTH); add(ta,BorderLayout.CENTER); p.add(cb1); p.add(cb2); } public static void main(String args[]) { CheckboxTest cbt = new CheckboxTest(); cbt.setSize(300,300); cbt.show(); } }--이 곳에 서명을 적어주십시오. 그 날이 오면 ...

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