{"id":89847,"date":"2024-09-02T18:00:54","date_gmt":"2024-09-02T12:30:54","guid":{"rendered":"https:\/\/techvidvan.com\/tutorials\/?p=89847"},"modified":"2024-09-02T18:10:30","modified_gmt":"2024-09-02T12:40:30","slug":"java-printwriter-class","status":"publish","type":"post","link":"https:\/\/techvidvan.com\/tutorials\/java-printwriter-class\/","title":{"rendered":"Java PrintWriter Class with Examples"},"content":{"rendered":"

Java PrintWriter class is the implementation of Writer class. It is used to print the formatted representation of objects to the text-output stream. PrintWriter is a class used to write any form of data, e.g. int, float, double, String or Object in the form of text either on the console or in a file in Java.\u201d For example, you may use the PrintWriter object to log data in a file or print it on the console.<\/p>\n

Class declaration<\/h2>\n

Let’s see the declaration for Java.io.PrintWriter class:<\/p>\n

public class PrintWriter extends Writer<\/pre>\n
Methods of PrintWriter class:<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Method<\/strong><\/td>\nDescription<\/strong><\/td>\n<\/tr>\n
void println(boolean x)<\/span><\/td>\nIt is used to print the boolean value.<\/span><\/td>\n<\/tr>\n
void println(char[] x)<\/span><\/td>\nIt is used to print an <\/span>array<\/span> of characters.<\/span><\/td>\n<\/tr>\n
void println(int x)<\/span><\/td>\nIt is used to print an integer.<\/span><\/td>\n<\/tr>\n
PrintWriter append(char c)<\/span><\/td>\nIt is used to append the specified character to the writer.<\/span><\/td>\n<\/tr>\n
PrintWriter append(CharSequence ch)<\/span><\/td>\nIt is used to append the specified character sequence to the writer.<\/span><\/td>\n<\/tr>\n
PrintWriter append(CharSequence ch, int start, int end)<\/span><\/td>\nIt is used to append a subsequence of a specified character to the writer.<\/span><\/td>\n<\/tr>\n
boolean checkError()<\/span><\/td>\nIt is used to flush the stream and check its error state.<\/span><\/td>\n<\/tr>\n
protected void setError()<\/span><\/td>\nIt is used to indicate that an error occurs.<\/span><\/td>\n<\/tr>\n
protected void clearError()<\/span><\/td>\nIt is used to clear the error state of a stream.<\/span><\/td>\n<\/tr>\n
PrintWriter format(String format, Object… args)<\/span><\/td>\nIt is used to write a formatted <\/span>string<\/span> to the writer using specified arguments and format string.<\/span><\/td>\n<\/tr>\n
void print(Object obj)<\/span><\/td>\nIt is used to print an object.<\/span><\/td>\n<\/tr>\n
void flush()<\/span><\/td>\nIt is used to flush the stream.<\/span><\/td>\n<\/tr>\n
void close()<\/span><\/td>\nIt is used to close the stream.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Java PrintWriter Example:<\/h3>\n
Let’s see the simple example of writing the data on a console<\/strong> and in a text file testout.txt<\/strong> using Java PrintWriter class.<\/p>\n
import java.io.File;  \r\nimport java.io.PrintWriter;  \r\npublic class TechVidvan{  \r\n    public static void main(String[] args) throws Exception {  \r\n                   PrintWriter writer = new PrintWriter(System.out);    \r\n      writer.write(\"TechVidvan provides tutorials of all technology.\");        \r\n writer.flush();  \r\n      writer.close();       \r\n      PrintWriter writer1 =null;      \r\n         writer1 = new PrintWriter(new File(\"D:\\\\testout.txt\"));  \r\n         writer1.write(\"Like Java, Spring, Hibernate, Android, PHP etc.\");                                                   \r\n                         writer1.flush();  \r\n         writer1.close();  \r\n    }  \r\n}<\/pre>\n
Constructor and Description:<\/h3>\n
    \n
  • PrintWriter(File file):<\/strong> Creates a new PrintWriter, without automatic line flushing, with the specified file.<\/li>\n
  • PrintWriter(File file, String csn):<\/strong> Creates a new PrintWriter, without automatic line flushing, with the specified file and charset.<\/li>\n
  • PrintWriter(OutputStream out):<\/strong> Creates a new PrintWriter, without automatic line flushing, from an existing OutputStream.<\/li>\n
  • PrintWriter(OutputStream out, boolean autoFlush):<\/strong> Creates a new PrintWriter from an existing OutputStream.<\/li>\n
  • PrintWriter(String fileName):<\/strong> Creates a new PrintWriter, without automatic line flushing, with the specified file name.<\/li>\n
  • PrintWriter(String fileName, String csn):<\/strong> Creates a new PrintWriter without automatic line flushing and with the specified file name and charset.<\/li>\n
  • PrintWriter(Writer out):<\/strong> Creates a new PrintWriter without automatic line flushing.<\/li>\n
  • PrintWriter(Writer out, boolean autoFlush):<\/strong> Creates a new PrintWriter.<\/li>\n<\/ul>\n
    Methods of PrintWriter class:<\/h3>\n
    1. PrintWriter append(char c)<\/h4>\n
    Appends the specified character to this writer<\/p>\n
    Syntax:<\/strong><\/p>\n
    public PrintWriter append(char c)<\/pre>\n
    Parameters:<\/strong>
    \nc – The 16-bit character to append<\/p>\n
    Returns:<\/strong>
    \nThis writer<\/p>\n
    2. PrintWriter append(CharSequence csq, int start, int end)<\/h4>\n
    Appends the specified character sequence to this writer.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public PrintWriter append(CharSequence csq,\r\n        int start,int end)<\/pre>\n
    Parameters:<\/strong>
    \ncsq –<\/strong> The character sequence from which a subsequence will be appended.
    \nstart –<\/strong> The index of the first character in the subsequence
    \nend –<\/strong> The index of the character following the last character in the subsequence<\/p>\n
    Returns:<\/strong>
    \nThis writer<\/p>\n
    Throws:
    \n<\/strong>IndexOutOfBoundsException<\/p>\n
    3. PrintWriter append(CharSequence csq)<\/h4>\n
    Appends a subsequence of the specified character sequence to this writer.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public PrintWriter append(CharSequence csq)<\/pre>\n
    Parameters:<\/strong>
    \ncsq –<\/strong> The character sequence to append.<\/p>\n
    Returns:<\/strong>
    \nThis writer<\/p>\n
    4. boolean checkError()<\/h4>\n
    Flushes the stream and checks its error state.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public boolean checkError()<\/pre>\n
    Returns:<\/strong> true if and only if this stream has encountered an IOException other than InterruptedIOException, or the setError method has been invoked<\/p>\n
    5. protected void clearError()<\/h4>\n
    Clears the internal error state of this stream.<\/p>\n
    Syntax:<\/strong><\/p>\n
    protected void clearError()<\/pre>\n
    6. void close()<\/h4>\n
    Closes the stream and releases any system resources associated with it.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void close()<\/pre>\n
    Specified by:<\/strong> close in class Writer<\/p>\n
    7. void flush()<\/h4>\n
    Flushes the stream.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void flush()<\/pre>\n
    Specified by:<\/strong> flush in interface Flushable<\/p>\n
    Specified by:<\/strong> flush in class Writer<\/p>\n
    8. PrintWriter format(Locale l, String format, Object\u2026 args)<\/h4>\n
    Write a formatted string to this writer using the specified format string and arguments.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public PrintWriter format(Locale l,\r\n        String format,\r\n        Object... args)<\/pre>\n
    Parameters:<\/strong><\/p>\n
    l –<\/strong> The locale is to be applied during formatting. If l is null, then no localization is applied.
    \nformat –<\/strong> A format string as described in Format string syntax
    \nargs –<\/strong> Arguments referenced by the format specifiers in the format string. The number of arguments is variable and may be zero.<\/p>\n
    Returns:<\/strong>
    \nThis writer<\/p>\n
    Throws:<\/strong>
    \nIllegalFormatException
    \nNullPointerException<\/p>\n
    9. PrintWriter format(String format, Object\u2026 args)<\/h4>\n
    Write a formatted string to this writer using the specified format string and arguments.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public PrintWriter format(String format,\r\n        Object... args)<\/pre>\n
    Parameters:<\/strong><\/p>\n
    format –<\/strong> A format string as described in Format string syntax
    \nargs –<\/strong> Arguments referenced by the format specifiers in the format string. The number of arguments is variable and may be zero.<\/p>\n
    Returns:<\/strong>
    \nThis writer<\/p>\n
    Throws:<\/strong>
    \nIllegalFormatException
    \nNullPointerException<\/p>\n
    10. void print(boolean b)<\/h4>\n
    Prints a boolean value.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(boolean b)<\/pre>\n
    11. void print(char c)<\/h4>\n
    Prints a character.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(char c)\r\n<\/pre>\n
    12. void print(char[] s)<\/h4>\n
    Prints an array of characters.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(char[] s)<\/pre>\n
    13. void print(double d)<\/h4>\n
    Prints a double-precision floating-point number.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(double b)<\/pre>\n
    14. void print(float f)<\/h4>\n
    Prints a floating-point number.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(float f)<\/pre>\n
    15. void print(int i)<\/h4>\n
    Prints an integer.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(int i)<\/pre>\n
    16. void print(long l)<\/h4>\n
    Prints a long integer.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(long l)<\/pre>\n
    17. void print(Object obj)<\/h4>\n
    Prints an object.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(Object obj)<\/pre>\n
    18. void print(String s)<\/h4>\n
    Prints a string.<\/p>\n
    Syntax:<\/strong><\/p>\n
    public void print(String s)<\/pre>\n
    Conclusion<\/h3>\n
    We can write formatted data for an underlying writer using the Java PrintWriter class java. A superclass of the PrintWriter is the Writer class. It is easier to customize the format as per the specified Locale (regional standards) while publishing global applications using the PrintWriter object.<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java PrintWriter class is the implementation of Writer class. It is used to print the formatted representation of objects to the text-output stream. PrintWriter is a class used to write any form of data,...<\/p>\n","protected":false},"author":6,"featured_media":447402,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[183],"tags":[296,5600,340,5668,327,5538,250,341,342],"class_list":["post-89847","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java","tag-java-printwriter","tag-java-printwriter-class","tag-java-printwriter-class-with-examples","tag-java-tutorials","tag-java-tutorials-for-beginners","tag-learn-java","tag-printwriter","tag-printwriter-class-in-java"],"yoast_head":"\nJava PrintWriter Class with Examples - TechVidvan<\/title>\n<meta name=\"description\" content=\"We can write formatted data for an underlying writer using the Java PrintWriter class java. 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