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46 lines (38 loc) · 808 Bytes
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Copy pathRunTime.java
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46 lines (38 loc) · 808 Bytes
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/*
获取一段程序的运行时间。
原理：获取程序开始和结束的时间并相减
*/
/*
获取时间：System.currentTimeMillis();
*/
abstract class GetTime
{
public final void getTime()
{
long start = System.currentTimeMillis();
runCode();
long end = System.currentTimeMillis();
System.out.println("毫秒："+(end-start));
}
public abstract void runCode();
}
class SubTime extends GetTime
{
public void runCode()
{
for (int i = 0; i <= 100000; i++)
{
if (100000 == i)
System.out.println("over!");
}
}
}
class RunTime
{
public static void main(String[] args)
{
SubTime gt = new SubTime();
//GetTime gt = new GetTime();
gt.getTime();
}
}