package study; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.Date; import java.util.List; public class kuaijiejian { private static final int INITIAL_SIZE = 10; public static int getInitialSize() { return INITIAL_SIZE; } public static void main(String[] args) { //region Description System.out.println("kuaijiejian"); ArrayList list1 = new ArrayList(); Date date = new Date(); //endregion list1.add(0, "de"); list1.add(1, "hua"); System.out.println(list1); // Method(); String str = new String(); String str1 = new String(); String str2 = new String(); Date date2 = new Date(); System.out.println(); } public static void Method() { try { FileInputStream fis = new FileInputStream("hello.txt"); } catch (FileNotFoundException e) { e.printStackTrace(); } } }