Code and Squares

public class HelloWorld{
     public static void main(String []args){
        for(int p=0;p<=9;p++)
            for(int q=0;q<=9;q++){
                long x = p*10000+q*1111;
                System.out.println(x+":"+(x*x));
            }
     }
}

10000:100000000
11111:123454321
12222:149377284
13333:177768889
14444:208629136
15555:241958025
16666:277755556
17777:316021729
18888:356756544
19999:399960001
20000:400000000
21111:445674321
22222:493817284
23333:544428889
24444:597509136
25555:653058025
26666:711075556
27777:771561729
28888:834516544
29999:899940001
30000:900000000
31111:967894321
32222:1038257284
33333:1111088889
34444:1186389136
35555:1264158025
36666:1344395556
37777:1427101729
38888:1512276544
39999:1599920001
40000:1600000000
41111:1690114321
42222:1782697284
43333:1877748889
44444:1975269136
45555:2075258025
46666:2177715556
47777:2282641729
48888:2390036544
49999:2499900001
50000:2500000000
51111:2612334321
52222:2727137284
53333:2844408889
54444:2964149136
55555:3086358025
56666:3211035556
57777:3338181729
58888:3467796544
59999:3599880001
60000:3600000000
61111:3734554321
62222:3871577284
63333:4011068889
64444:4153029136
65555:4297458025
66666:4444355556
67777:4593721729
68888:4745556544
69999:4899860001
70000:4900000000
71111:5056774321
72222:5216017284
73333:5377728889
74444:5541909136
75555:5708558025
76666:5877675556
77777:6049261729
78888:6223316544
79999:6399840001
80000:6400000000
81111:6578994321
82222:6760457284
83333:6944388889
84444:7130789136
85555:7319658025
86666:7510995556
87777:7704801729
88888:7901076544
89999:8099820001
90000:8100000000
91111:8301214321
92222:8504897284
93333:8711048889
94444:8919669136
95555:9130758025
96666:9344315556
97777:9560341729
98888:9778836544
99999:9999800001