几道java基础题

1.public static void main(String[] args) {

String classPath = "java.lang.String";

System.out.println(classPath.replaceAll(".", "/"));

}

2.public static void main(String[] args) {

StringBuilder sb = new StringBuilder();

switch(1) {

case 1 : sb.append("Hello a");

case 2 : sb.append("b");

case 3 : sb.append("c");

default : sb.append("d");

}

System.out.println(sb.toString());

}

3.public class Increment {

public static void main(String[] args) {

int j = 0;

for (int i = 0; i < 100; i++)

j = j++;

System.out.println(j);

}

}

4.import java.util.*;

public class DatingGame {

public static void main(String[] args) {

Calendar cal = Calendar.getInstance();

cal.set(1999, 12, 31); // Year, Month, Day

System.out.print(cal.get(Calendar.YEAR) + " ");

Date d = cal.getTime();

System.out.println(d.getDay());

}

}

待续中...