if语句使用
if(判断语句){
执行语句;
}else{
否则执行该语句;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("年份:");
int y = sc.nextInt();
if (y % 400 == 0 || (y % 4 == 0 && y % 100 != 0)) {
System.out.println(y + "是闰年");
} else {
System.out.println(y + "是平年");
}
}
运行结果:
年份:2008
2008是闰年
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
if (hour >= 12) {
System.out.println("下午");
} else {
System.out.println("下午");
}
}
运行结果:
下午
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
int week = c.get(Calendar.DAY_OF_WEEK);
if (week == 1) {
System.out.println("星期日");
} else if (week == 2) {
System.out.println("星期一");
} else if (week == 3) {
System.out.println("星期二");
} else if (week == 4) {
System.out.println("星期三");
} else if (week == 5) {
System.out.println("星期四");
} else if (week == 6) {
System.out.println("星期五");
} else if (week == 7) {
System.out.println("星期六");
}
System.out.printf("%tA%n", c);
}
运行结果:
星期一
星期一