Level 0 : 搞个类（人，动物，车，书。。。），再搞个对象。（同学，朋友，室友，女盆友，～友。。。），并按以下格式打印出该对象的信息。
{
//属性:内容,(英文逗号隔开)
"name":"kuang",
"gender":"女",
"faceValue":6,
"height":160,
"mind":"merry"
}
要求：
严格遵循命名规范。（类名，方法名，属性名）
Level 1：将**以下字符串**以英文逗号拆分，并写一个至少含有以下方法中前三个方法的字符串工具类，对分割后的字符串一一判断，并打印判断结果。字符串： acbdw,1269547,AASIDX,AIUydjs,12sjaA,3819247,ausSHSzio,IUFISsi
方法一：判断字符串是否全是数字
方法二：判断字符串是否是大写字母
方法三：判断字符串是否全是小写字母
方法四：如果字符串全是字母，将其中所有小写字母转换为大写字母。
方法五：如果字符串全是数字组成，则按照数字大小升序排序并装入整型数组中。最后按升序打印出该数组
方法六：如果字符串全是字母组成，则按照字母排序装入字符数组中，并按字母顺序打印出该该数组。
转成json就可以了
package text;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public class A {
public String name;
public String gender;
public int faceValue;
public int height;
public String mind;
public A(String name,String gender,int faceValue,int height,String mind){
this.name=name;
this.gender=gender;
this.faceValue=faceValue;
this.height=height;
this.mind=mind;
}
public String toString(){
String str = "{\n \"name\":\""+name+"\",\n\"gender\":\""+gender+"\",\n\"faceValue\":"+faceValue+",\n\"height\":"+height+",\n\"mind\":\""+mind+"\" \n}";
return str;
}
public static void main(String[] args){
A a = new A("kuang","女",6,160,"merry");
System.out.println(a.toString());
String str = "acbdw,1269547,AASIDX,AIUydjs,12sjaA,3819247,ausSHSzio,IUFISsi";
String[] s = str.split(",");//字符串切割为数组
for(int i=0;i<s.length;i++){
B.isNumber(s[i]);
B.isUpper(s[i]);
B.isLower(s[i]);
B.lowerToUpper(s[i]);
B.numToArray(s[i]);
B.letterToArray(s[i]);
}
}
}
class B{
static String[] str;
//判断是否是数字
public static boolean isNumber(String str){
boolean result=false;
String regx = "[0-9]{0,"+str.length()+"}";
result = str.matches(regx);
System.out.println("字符串:"+str+"是纯数字吗？"+result);
return result;
}
//判断是否全是大写字母
public static boolean isUpper(String str){
boolean result =false;
String regx = "[A-Z]{0,"+str.length()+"}";
result = str.matches(regx);
System.out.println("字符串:"+str+"是全大写字母吗？"+result);
return result;
}
//判断是否全是小写字母
public static boolean isLower(String str){
boolean result =false;
String regx = "[a-z]{0,"+str.length()+"}";
result = str.matches(regx);
System.out.println("字符串:"+str+"是全小写字母吗？"+result);
return result;
}
//小写转大写
public static void lowerToUpper(String str){
String newStr="";
String regx = "[a-zA-Z]{0,"+str.length()+"}";
if(str.matches(regx)){
newStr = str.toUpperCase();
System.out.println("字符串:"+str+"转大写后为:"+newStr);
}
}
//纯数字转数组升序
public static void numToArray(String str){
String[] arr=null;
int[] intArr = null;
int e;
if(isNumber(str)){
intArr = new int[str.length()];
arr = str.split("");
for(int i=0;i<arr.length;i++){
e=Integer.parseInt(arr[i]);
intArr[i] = e;
}
}
if(intArr!=null){
Arrays.sort(intArr);
System.out.println("纯数字字符串:"+str+"排序:"+Arrays.toString(intArr));
}
}
//字母排序
public static void letterToArray(String str){
String[] s=null;
if(str.matches("[a-zA-Z]{"+str.length()+"}")){
s=str.split("");
Arrays.sort(s);
System.out.println("字符串"+str+"排序:"+Arrays.toString(s));
}
}
}
apache中的方法
方法一：判断字符串是否全是数字
/**
* <p>Checks if the String contains only unicode digits.
* A decimal point is not a unicode digit and returns false.</p>
*
* <p><code>null</code> will return <code>false</code>.
* An empty String (length()=0) will return <code>true</code>.</p>
*
* <pre>
* StringUtils.isNumeric(null) = false
* StringUtils.isNumeric("") = true
* StringUtils.isNumeric(" ") = false
* StringUtils.isNumeric("123") = true
* StringUtils.isNumeric("12 3") = false
* StringUtils.isNumeric("ab2c") = false
* StringUtils.isNumeric("12-3") = false
* StringUtils.isNumeric("12.3") = false
* </pre>
*
* @param str the String to check, may be null
* @return <code>true</code> if only contains digits, and is non-null
*/
public static boolean isNumeric(String str) {
if (str == null) {
return false;
}
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (Character.isDigit(str.charAt(i)) == false) {
return false;
}
}
return true;
}
方法二：判断字符串是否是大写字母
/**
* <p>Checks if the String contains only uppercase characters.</p>
*
* <p><code>null</code> will return <code>false</code>.
* An empty String (length()=0) will return <code>false</code>.</p>
*
* <pre>
* StringUtils.isAllUpperCase(null) = false
* StringUtils.isAllUpperCase("") = false
* StringUtils.isAllUpperCase(" ") = false
* StringUtils.isAllUpperCase("ABC") = true
* StringUtils.isAllUpperCase("aBC") = false
* </pre>
*
* @param str the String to check, may be null
* @return <code>true</code> if only contains uppercase characters, and is non-null
* @since 2.5
*/
public static boolean isAllUpperCase(String str) {
if (str == null || isEmpty(str)) {
return false;
}
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (Character.isUpperCase(str.charAt(i)) == false) {
return false;
}
}
return true;
}
方法三：判断字符串是否全是小写字母
/**
* <p>Checks if the String contains only lowercase characters.</p>
*
* <p><code>null</code> will return <code>false</code>.
* An empty String (length()=0) will return <code>false</code>.</p>
*
* <pre>
* StringUtils.isAllLowerCase(null) = false
* StringUtils.isAllLowerCase("") = false
* StringUtils.isAllLowerCase(" ") = false
* StringUtils.isAllLowerCase("abc") = true
* StringUtils.isAllLowerCase("abC") = false
* </pre>
*
* @param str the String to check, may be null
* @return <code>true</code> if only contains lowercase characters, and is non-null
* @since 2.5
*/
public static boolean isAllLowerCase(String str) {
if (str == null || isEmpty(str)) {
return false;
}
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (Character.isLowerCase(str.charAt(i)) == false) {
return false;
}
}
return true;
}
方法四：如果字符串全是字母，将其中所有小写字母转换为大写字母。
/**
* <p>Converts a String to upper case as per {@link String#toUpperCase()}.</p>
*
* <p>A <code>null</code> input String returns <code>null</code>.</p>
*
* <pre>
* StringUtils.upperCase(null) = null
* StringUtils.upperCase("") = ""
* StringUtils.upperCase("aBc") = "ABC"
* </pre>
*
* <p><strong>Note:</strong> As described in the documentation for {@link String#toUpperCase()},
* the result of this method is affected by the current locale.
* For platform-independent case transformations, the method {@link #lowerCase(String, Locale)}
* should be used with a specific locale (e.g. {@link Locale#ENGLISH}).</p>
*
* @param str the String to upper case, may be null
* @return the upper cased String, <code>null</code> if null String input
*/
public static String upperCase(String str) {
if (str == null) {
return null;
}
return str.toUpperCase();
}
剩下两个可以自己写，呵呵！~~~