?? test.java
字號:
class test
{
public static void foo(int val)
{
int a = 10;
int b = 20;
int[] arr = new int[val];
for (int j=0; j<val;j++) {
for (int i=0; i<val; i++)
arr[i] = a + b;
}
}
public static void bar(int val)
{
int a = 10;
int b = 20;
int c = a + b;
int[] arr = new int[val];
for (int j=0; j<val;j++) {
for (int i=0; i<val; i++)
arr[i] = c;
}
}
public static void main(String args[])
{
int val = Integer.parseInt(args[0]);
System.gc();
long start = System.currentTimeMillis();
foo(val);
long end = System.currentTimeMillis();
System.out.println("foo is " + (end-start));
long num =end-start;
System.gc();
bar(val);
end = System.currentTimeMillis();
System.out.println("bar is " + (end-start));
num=((num-(end-start))*100)/num;
System.out.println("bar is " + num + " percent faster");
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -