java程序题解决方法_J2SE

java程序题
今天写了几个简单的java程序题

http://blog.csdn.net/zs312979674/article/details/6830421

求方法

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for example

Java code

/* *第一题  */  public static int getDay(String strDate){    try {        int year = Integer.valueOf(strDate.substring(0,strDate.indexOf("年")));          int month = Integer.valueOf(strDate.substring(strDate.indexOf("年")+1,strDate.indexOf("月")));          int day = Integer.valueOf(strDate.substring(strDate.indexOf("月")+1,strDate.indexOf("日")));        Calendar c = Calendar.getInstance();        c.set(Calendar.YEAR, year);        c.set(Calendar.MONTH, month-1);        c.set(Calendar.DAY_OF_MONTH, day);        return Calendar.get(Calendar.DAY_OF_YEAR);    } catch (Exception e) {        e.printStackTrace();    }    return -1;}  /* * 第二题 */  public static void nine(){    for (int i=1; i<10; i++) {        for (int j=1; j<=i; j++) {            System.out.printf("%d*%d=%-2d ", j, i, j*i);        }        System.out.println();    }}/* * 第三题 */  public static boolean testNumber(int num){    int sum=0, tmp=num, m=0;    while (tmp > 0) {        m = tmp%10;        sum += m*m;        tmp /= 10;    }    return sum == num;}
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第一题：
Java code                public static int getDay0(String strDate){        int year = Integer.valueOf(strDate.substring(0, strDate.indexOf("年")));        int month = Integer.valueOf(strDate.substring(strDate.indexOf("年") + 1, strDate.indexOf("月")));        int day = Integer.valueOf(strDate.substring(strDate.indexOf("月") + 1, strDate.indexOf("日")));        Calendar calendar = new GregorianCalendar(year, month-1, day);        return calendar.get(Calendar.DAY_OF_YEAR);    }
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探讨

for example
Java code
/* 
*第一题  
*/  
public static int getDay(String strDate){
    try {
        int year = Integer.valueOf(strDate.substring(0,strDate.indexOf("年")));  
        int month = Intege……

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