Ubuntu下JDK7安裝全過程并調試第一個帶包的java程式

package ubuntu.java.basic;

import java.util.*;

public class ArrayTest {

    public static void main(String[] args) {

        int[] a = new int[5];

        for (int i=0;i<a.length;i++)

            a[i] = i*i;

        System.out.println(Arrays.toString(a));

        String[] b = {"hello","world","hi","you","good"};

        System.out.println(Arrays.toString(b));

    }

}

david@ubuntu:~$ cd JavaTrain

david@ubuntu:~/JavaTrain$ ls

ArrayTest.java

david@ubuntu:~/JavaTrain$ javac -d . ArrayTest.java

ArrayTest.java  ubuntu

david@ubuntu:~/JavaTrain$ java ubuntu.java.basic.ArrayTest

[0, 1, 4, 9, 16]

[hello, world, hi, you, good]