1. PrintWriter()使用示例

package StreamAndFile;import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.io.UnsupportedEncodingException;import java.util.Calendar;import java.util.GregorianCalendar;public class TextFileTest {    public static class Employee{        String name;        double salary;        int year,month,day;        public Employee(String name,double salary,int year,int month,int day){            this.name=name;            this.salary=salary;            this.year=year;            this.month=month;            this.day=day;        }        public String getName() {            return name;        }                public double getSalary() {            return salary;        }                public int getYear() {            return year;        }        public int getMonth() {            return month;        }        public int getDay() {            return day;        }    }    //将数据写出到文件    public static void writeData(Employee[] staff, PrintWriter out){        for(int i=0;i

程序运行结果如下：

写出成功！读出的数据为：Carl Cracker|75000.0|1987|12|15Harry Hacker|50000.0|1989|10|1Tony Tester|40000.0|1990|3|15

 2. 获得字符集别名及所有可用字符集

获得字符集别名：

package StreamAndFile;import java.nio.charset.Charset;import java.util.Set;//输出字符集的别名public class GetCharSet {    public static void main(String[] args) {        Charset cset = Charset.forName("ISO-8859-1");        Set
     
       aliases = cset.aliases();        for(String aliase : aliases){            System.out.println(aliase);        }    }}
     

程序运行结果如下：

csISOLatin1latin1IBM-819iso-ir-1008859_1ISO_8859-1:1987ISO_8859-1819l1ISO8859-1IBM819ISO_8859_1ISO8859_1cp819

 获得所有可用字符集：

package StreamAndFile;import java.nio.charset.Charset;import java.util.Map;//输出字符集的别名public class GetCharSet {    public static void main(String[] args) {
    //输出所有可用的字符集的名字        Map
     
       charsets = Charset.availableCharsets();        for(String name:charsets.keySet()){            System.out.println(name);        }    }}