How to implement linear search in java

Linear Search

public class T05 {
    public static void main(String[] args) {
        int[]arr=new int[]{1,2,3,4,5,6,7,8,9};
        for(int i=0;i< arr.length;i++){
            System.out.print(arr[i]+"\t");
        }
        System.out.println();
        for(int i=0;i< arr.length;i++){
            if(i< arr.length-1-i){
                int a=arr[i];
                arr[i]=arr[arr.length-1-i];
                arr[arr.length-1-i]=a;
            }
        }
        for(int i=0;i< arr.length;i++){
            System.out.print(arr[i]+"\t");
        }
    }
}

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