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SwingUtilities.updateComponentTreeUI(frame);
frame.pack();
 
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public class ArrayTest {
public static void main(String[] args){
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Lesson1 Foundations of java and oo programming

Today , i take the first lesson of java ,let me sum up the details:
firstly,about jdk and jre.jdk stands for java development kit,while jre represent java Runtime Environment. jdk is the key of Java. And,jvm(java virtual machine) is the key of jre.
then ,about the platform independence of java.Dur ......

ʹÓà Java Debug Interface£¨JDI£©µ÷ÊÔ¶àÏß³ÌÓ¦ÓóÌÐò

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