java Array学习

我们来使用java的数组的例子，来学习一下java的数组使用。
now we use arry. we use string to learn array.
of course you can use int type in array.
for example:

int[] stu = new int[2]
/**
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*/
import java.util.*;
public class JavaArray
{
public static void main(String[] args){
String[] arr = new String[3]; //initialize the array
arr[0] = "a";
arr[1] = "b";
arr[2] = "c";

for(int i = 0 ; i < arr.length;i++){
System.out.println("arr["+i+"] " + arr[i]);
}

// another way to initialize the array and assign the value to the array
System.out.println("--------------------------");
String[] arr2 = new String[]{"a1","a3","a2"};

for(int i = 0 ; i < arr2.length;i++){
System.out.println("arr2["+i+"] " + arr2[i]);
}

System.out.println("--------------------------");
Arrays.sort(arr2);// sort the array,you must import java.util.*
for(int i = 0 ; i < arr2.length;i++){
System.out.println("arr2["+i+"] " + arr2[i]);
}

//two-dimensional array
System.out.println("--------------------------");
String[][] tarr = new String[2][2];
tarr[0][0] = "x1";
tarr[0][1] = "x2";
tarr[1][0] = "x3";
tarr[1][1] = "x4";
for(int i = 0 ; i < tarr.length;i++){
for (int j = 0 ; j < tarr[i].length ; j ++ ){
System.out.println(tarr[i][j]);
}
}
}
}

http://java-er.com/blog/java-array/