Public class Du2 1 {
Public static void main(String[] args) {
int[] a = { 1，23，5，57， 129， 1 1 }；
int[] b = {2，4，6，8， 10， 13，3 }；
boolean isEqual = Arrays.equals(a，b)； //Test for equality
System.out.println("a = b？ +is equal)；
System.out.println ("Before sorting by ASC, the array is:");
print array(a)；
arrays . sort(a)； //Group A is arranged in ascending order.
System.out.println ("After sorting by ASC, an array is:");
print array(a)；
//Query whether there is a user-specified value in array A arranged in ascending order.
int num 1 = 1 1，num2 = 22
int index = Arrays.binarySearch(a，num 1)；
int index 2 = arrays . binary search(a，num 2)；
if(index & lt； 0){
System.out.println (num1+not found in array a);
} Otherwise {
System. out.println (num1+"position in array a"+index+");
}
if(index 2 & lt； 0){
System.out.println (num 2+not found in array a);
} Otherwise {
System.out.println(num2+"in the position of array A"+index+");
}
}
Private static void printArray(int[] a) {
for(int I = 0； I<a. Length; i++){
System.out.print(a[i] +"，")；
}
system . out . println()；
}
}
-testing.
a = b？ wrong
Before sorting by ASC, the array is:
1, 23, 5, 57, 129, 1 1,
After sorting by ASC, the array is:
1, 5, 1 1, 23, 57, 129,
1 1 in position 2 of array a.
22 not found in array a.