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| 1 | +package test; |
| 2 | + |
| 3 | +public class Test_Format { |
| 4 | + public static void main(String[] args) { |
| 5 | + |
| 6 | + double d = 1234.56789356789; |
| 7 | + for (int i = -10; i < 10; i++) { |
| 8 | + System.out.println("----"); |
| 9 | + test2(d * Math.pow(10, i)); |
| 10 | + } |
| 11 | + d = 1.5; |
| 12 | + for (int i = -10; i < 10; i++) { |
| 13 | + System.out.println("----"); |
| 14 | + test2(d * Math.pow(10, i)); |
| 15 | + } |
| 16 | + d = 2.5; |
| 17 | + for (int i = -10; i < 10; i++) { |
| 18 | + System.out.println("----"); |
| 19 | + test2(d * Math.pow(10, i)); |
| 20 | + } |
| 21 | + d = 1; |
| 22 | + for (int i = -10; i < 10; i++) { |
| 23 | + System.out.println("----"); |
| 24 | + test2(d * Math.pow(10, i)); |
| 25 | + } |
| 26 | + d = 100; |
| 27 | + for (int i = -10; i < 10; i++) { |
| 28 | + System.out.println("----"); |
| 29 | + test2(d * Math.pow(10, i)); |
| 30 | + } |
| 31 | + d = 100.34567891234; |
| 32 | + for (int i = -10; i < 10; i++) { |
| 33 | + System.out.println("----"); |
| 34 | + test2(d * Math.pow(10, i)); |
| 35 | + } |
| 36 | + d = 4.95; |
| 37 | + for (int i = -10; i < 10; i++) { |
| 38 | + System.out.println("----"); |
| 39 | + test2(d * Math.pow(10, i)); |
| 40 | + } |
| 41 | + d = 4.5; |
| 42 | + for (int i = -10; i < 10; i++) { |
| 43 | + System.out.println("----"); |
| 44 | + test2(d * Math.pow(10, i)); |
| 45 | + } |
| 46 | + d = 3.95; |
| 47 | + for (int i = -10; i < 10; i++) { |
| 48 | + System.out.println("----"); |
| 49 | + test2(d * Math.pow(10, i)); |
| 50 | + } |
| 51 | + d = 3.5; |
| 52 | + for (int i = -10; i < 10; i++) { |
| 53 | + System.out.println("----"); |
| 54 | + test2(d * Math.pow(10, i)); |
| 55 | + } |
| 56 | + d = 12345; |
| 57 | + for (int i = -10; i < 10; i++) { |
| 58 | + System.out.println("----"); |
| 59 | + test2(d * Math.pow(10, i)); |
| 60 | + } |
| 61 | + System.out.println("{" + String.format("%.3f", 36f) + "}"); |
| 62 | + System.out.println("----"); |
| 63 | + |
| 64 | + } |
| 65 | + |
| 66 | + private static void test(double value, int prec) { |
| 67 | + |
| 68 | + System.out.println(value + " prec=" + prec + " " + String.format("%1." + prec + "f", value) + " " |
| 69 | + + String.format("%1." + prec + "g", value) + " " + String.format("%1." + prec + "e", value) + " "); |
| 70 | + } |
| 71 | + |
| 72 | + private static void test2(double d) { |
| 73 | + for (int i = 0; i < 10; i++) |
| 74 | + test(d, i); |
| 75 | + } |
| 76 | +} |
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