很急的数组问题

                int[] a = {1,2,3,4,5};
        int[] b = {6,7,8,9,10};
        int[] c = {11,12,13,14,15};
        int[] d = new int[3];
        int[] f = new int[3];
        for(int i=0;i<d.length;i++){
            for(int j=0;j<d.length;j++){
                if(i==0&&j==0){
                    d[j]=a[i];
                }else if(i==0&&j==1){
                    d[j]=b[i];
                }else if(i==0&&j==2){
                    d[j]=c[i];
                }
                if(i==1&&j==0){
                    f[j]=a[i];
                }else if(i==1&&j==1){
                    f[j]=b[i];
                }else if(i==1&&j==2){
                    f[j]=c[i];
                }
            }
        }