回答編集履歴
3
1970年1月1日からのミリ秒での計算
test
CHANGED
@@ -61,3 +61,67 @@
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```
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https://ideone.com/ZoC2g4
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# ミリ秒がついてきたのでそのタイプ
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```
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/* package whatever; // don't place package name! */
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import java.util.*;
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import java.lang.*;
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import java.io.*;
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/* Name of the class has to be "Main" only if the class is public. */
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class Ideone
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{
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public static void main (String[] args) throws java.lang.Exception
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{
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Calendar c = Calendar.getInstance();
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c.set(Calendar.YEAR, 1970);
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c.set(Calendar.MONTH, 0);
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c.set(Calendar.DAY_OF_MONTH, 1);
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c.add(Calendar.SECOND, (int)(1516618800000L / 1000));
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System.out.println(c.getTime().getTime()); // 1900年1月1日からのミリ秒
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System.out.println(c.getTime()); // Date型
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}
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}
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```
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https://ideone.com/fXUB4x
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2
誤字
test
CHANGED
@@ -50,11 +50,9 @@
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System.out.println(c.getTime().getTime()); // 1900年1月1日からのミリ秒
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-
System.out.println(c.getTime().getTime()); // DATE
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System.out.println(c.getTime()); //
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System.out.println(c.getTime()); // Date型
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}
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1
参考コードw
test
CHANGED
@@ -9,3 +9,57 @@
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それから new Date(long) を利用してください。
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というかカレンダー型で計算したほうがいいですね。
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```
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/* package whatever; // don't place package name! */
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import java.util.*;
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import java.lang.*;
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import java.io.*;
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/* Name of the class has to be "Main" only if the class is public. */
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class Ideone
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{
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public static void main (String[] args) throws java.lang.Exception
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{
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Calendar c = Calendar.getInstance();
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c.set(Calendar.YEAR, 1970);
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c.set(Calendar.MONTH, 0);
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c.set(Calendar.DAY_OF_MONTH, 1);
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c.add(Calendar.SECOND, 1499090900);
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System.out.println(c.getTime().getTime()); // DATE
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System.out.println(c.getTime()); // LONG
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}
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}
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```
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65
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https://ideone.com/ZoC2g4
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