Threads

[one198]

Hi Guys

I not expert in thread either any programing lanauge.but I still learning java.I got a problem once i wrote some java coding.It's not a syntax error.I want to how know to do this.Below i metion coding

public class Test137 {

    public static void main(String[] args){

        String[] str={"TOM","ANNE","RYABN","SAM"};
[COLOR="Red"]
        for(int i=0;i<str.length;i++){


            System.out.println(str[i]);
        }[/COLOR]
       [COLOR="Green"] for(int j=str.length-1;j>=0;j--){

        System.out.println(str[j]);
        }[/COLOR]


    }

in above coding i Highlighted specific segements of coding in Red and Green colors.So what I want to do is using thread I want to do these 2 separate for loops.And u cant use one of element in string once it's used by another thread.it's means

Thread1 cant user str[3] while Thread2 is using str[3].Please help me

Thank You

[hardwired]

public class Test137Rx {
    static String[] str={"TOM","ANNE","RYABN","SAM"};

    public static void main(String[] args){
        new Thread(runner1).start();
        new Thread(runner2).start();
    }
/*
    private static synchronized String getValue(int index) {
        return str[index];
    }
*/
    private static String getValue(int index) {
        synchronized(str) {
            return str[index];
        }
    }

    private static Runnable runner1 = new Runnable() {
        public void run() {
            for(int i=0;i<str.length;i++){
                System.out.println("1  " + getValue(i));
            }
        }
    };

    private static Runnable runner2 = new Runnable() {
        public void run() {
            for(int j=str.length-1;j>=0;j--){
                System.out.println("2  " + getValue(j));
            }
        }
    };
}