在Java輸入四個數字，小到大的順序依次輸出，

package wode;
import java.util.Scanner;
public class Paixu {
 public static void main(String[] args){
 Scanner sc=new Scanner(System.in);
 int i ,j,t;
 int []a={12,34,434,45,30};
 for(j=0;j<a.length-1;j++)
 for(i=0;i<a.length-1-j;i++)
 if(a[i]>a[i+1]){
 t=a[i];
 a[i]=a[i+1];
 a[i+1]=t;
 }
 for(int x:a){
 System.out.print("\t"+x);
 }
 }
}