public class NumberSort {

/**
*读进9个数；
*构建成一个int型数组；
*顺序排好；
**/
public static void main(String args[]) {

int a[] = new int[args.length];

if (args.length == 0) {
System.out.println("Usage: Please input some numbers in command line parameters. 0");
System.exit(-1);
}

try {
for ( int i=0; i<args.length; i++ ) {
a[i] = Integer.parseInt(args[i]);
}
} catch (NumberFormatException nfe) {
System.out.println("Usage: Please input some numbers in command line parameters! err");
nfe.printStackTrace();
System.exit(-1);
}

print(a);
bubbleSort(a);
print(a);

}

private static void selectionSort(int a[]) {
int k, temp;

//找到后面最小的数,并且交换到前面
for (int i=0; i<a.length; i++) {
k = i;
for (int j=k+1; j<a.length; j++) {
if (a[j] < a[k]) {
k = j;
}
}

if (k != i) {
temp = a[i];
a[i] = a[k];
a[k] = temp;
}
}
}

private static void bubbleSort(int a[]) {
int temp;
for (int i=0; i<a.length-1; i++) {
for (int j=0; j<a.length-i-1; j++) {
if (a[j] > a[j+1]) {
temp = a[j];
a[j] = a[j+1];
a[j+1] = temp;
}
}
}
}

private static void print(int a[]) {
for ( int i=0; i<a.length; i++) {
System.out.print(a[i] + " ");
}

System.out.println();

}
}