Java.io.PrintWriter class in Java | Set 2 Last Updated : 23 Jul, 2025 Comments Improve Suggest changes Like Article Like Report Java.io.PrintWriter class in Java | Set 1 More methods: PrintWriter printf(Locale l, String format, Object... args) : A convenience method to write a formatted string to this writer using the specified format string and arguments. Syntax :public PrintWriter printf(Locale l, String format, Object... args) Parameters: l - The locale to apply during formatting. If l is null then no localization is applied. format - A format string as described in Format string syntax args - Arguments referenced by the format specifiers in the format string. Returns: This writer Throws: IllegalFormatException NullPointerException Java import java.io.*; import java.util.Locale; //Java program to demonstrate printf method public class PrintWriterDemo { public static void main(String[] args) { String s = "for"; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // printf this string pr.printf(Locale.CANADA, "Geeks%sGeeks", s); // flush the stream pr.flush(); } } Output: GeeksforGeeks PrintWriter printf(String format, Object... args) : A convenient method to write a formatted string to this writer using the specified format string and arguments. Syntax :public PrintWriter printf(String format, Object... args) Parameters: format - A format string as described in Format string syntax args - Arguments referenced by the format specifiers in the format string. Returns: This writer Throws: IllegalFormatException NullPointerException Java import java.io.*; //Java program to demonstrate printf(String format, Object... args) method public class PrintWriterDemo { public static void main(String[] args) { String s = "for"; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // printf this string pr.printf("Geeks%sGeeks", s); // flush the stream pr.flush(); } } Output: GeeksforGeeks void println(): Terminates the current line by writing the line separator string. Syntax :public void println() Java import java.io.*; //Java program to demonstrate println() method public class PrintWriterDemo { public static void main(String[] args) { String s = "GeeksforGeeks"; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // printf this string pr.printf("%s", s); // flush the stream pr.flush(); } } Output: GeeksforGeeks void println(boolean x): Prints a boolean and then terminate the line. Syntax :public void println(boolean x) Java import java.io.*; //Java program to demonstrate println(boolean) method public class PrintWriterDemo { public static void main(String[] args) { // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a boolean and change line pr.println(true); pr.print("New Line"); // flush the stream pr.flush(); } } Output: true New Line void println(char x): Prints a character and then terminate the line. Syntax :public void println(char x) Java import java.io.*; //Java program to demonstrate println(char x) method public class PrintWriterDemo { public static void main(String[] args) { char c = 'a'; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a char and change line pr.println(c); pr.println('b'); // flush the stream pr.flush(); } } Output: a b void println(char[] x): Prints an array of characters and then terminate the line. Syntax :public void println(char[] x) Java import java.io.*; //Java program to demonstrate println(char[] x) method public class PrintWriterDemo { public static void main(String[] args) { char[] c = {'a', 'b', 'c'}; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print an array and change line pr.println(c); // flush the stream pr.flush(); } } Output: abc void println(double x): Prints a double and then terminate the line. Syntax :public void println(double x) Java import java.io.*; //Java program to demonstrate println(double x) method public class PrintWriterDemo { public static void main(String[] args) { double c = 176.348; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a double and change line pr.println(c); // flush the stream pr.flush(); } } Output: 176.348 void println(float x): Prints a float and then terminate the line. Syntax :public void println(float x) Java //Java program to demonstrate println(float x) method import java.io.*; public class PrintWriterDemo { public static void main(String[] args) { float c = 5.76348f; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a float and change line pr.println(c); // flush the stream pr.flush(); } } Output: 5.76348 void println(int x): Prints an integer and then terminate the line. Syntax :public void println(boolean x) Java import java.io.*; //Java program to demonstrate println(int x) method public class PrintWriterDemo { public static void main(String[] args) { int c = 15; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print an integer and change line pr.println(c); // flush the stream pr.flush(); } } Output: 15 void println(long x): Prints a long integer and then terminate the line. Syntax :public void println(long x) Java import java.io.*; //Java program to demonstrate println(long x) method public class PrintWriterDemo { public static void main(String[] args) { long c = 1252344125l; try { // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a long and change line pr.println(c); // flush the stream pr.flush(); } catch (Exception ex) { ex.printStackTrace(); } } } Output: 1252344125 void println(Object x) :Prints an Object and then terminate the line. Syntax :public void println(Object x) Java import java.io.*; //Java program to demonstrate println(Object x) method public class PrintWriterDemo { public static void main(String[] args) { Object c = 10; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print an object and change line pr.println(c); // flush the stream pr.flush(); } } Output: 10 void println(String x) : Prints a String and then terminate the line. Syntax :public void println(boolean x) Java import java.io.*; //Java program to demonstrate println(String x) method public class PrintWriterDemo { public static void main(String[] args) { String c = "GeeksforGeeks"; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // print a string and change line pr.println(c); // flush the stream pr.flush(); } } Output: GeeksforGeeks protected void setError() : Sets the error state of the stream to true. Syntax :public void println(String x) Java import java.io.*; //Java program to demonstrate setError() method public class PrintWriterDemo extends PrintWriter { public PrintWriterDemo(OutputStream out) { super(out); } public static void main(String[] args) { char c[] = {70, 71, 72, 73, 74, 75, 76}; // create PrintWriter object PrintWriterDemo pr= new PrintWriterDemo(System.out); // write char 1-3 pr.write(c, 1, 3); // flush the stream pr.flush(); // set an internal error pr.setError(); } } Output: GHI void write(char [] buf, int off, int len) : Writes len char from the specified char array starting at offset off to this stream. Syntax :public void write(char [] buf, int off, int len) Overrides: write in class FilterOutputStream Parameters: buf - A char array off - Offset from which to start taking char len - Number of char to write Java import java.io.*; //Java program to demonstrate write() method public class PrintWriterDemo { public static void main(String[] args) { char c[] = {70, 71, 72, 73, 74, 75, 76}; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // write char 1-3 pr.write(c, 1, 3); // flush the stream pr.flush(); } } Output: GHI void write(int b) : Writes the specified char to this stream. Syntax :public void write(int b) Overrides: write in class Writer Parameters: b - The char to be written Java import java.io.*; //Java program to demonstrate write(int b) method public class PrintWriterDemo { public static void main(String[] args) { int c = 70; // create PrintWriter object PrintWriter pr= new PrintWriter(System.out); // write char c which is character F in ASCII pr.write(c); // flush the stream pr.flush(); } } Output: F void write(String s) : Writes a string. Syntax :public void write(String s) Parameters: s - String to be written Java import java.io.*; public class PrintWriterDemo { public static void main(String[] args) { String s = "Hello"; try { // create a new writer PrintWriter pw = new PrintWriter(System.out); // write strings pw.write(s); pw.write(" World"); // flush the writer pw.flush(); } catch (Exception ex) { ex.printStackTrace(); } } } Hello World void write(String s, int off, int len) : Writes a portion of a string. Syntax :public void write(String s, int off, int len) Parameters: s - A String off - Offset from which to start writing characters len - Number of characters to write Java import java.io.*; public class PrintWriterDemo { public static void main(String[] args) { String s = "Hello World"; try { // create a new writer PrintWriter pw = new PrintWriter(System.out); // write substrings pw.write(s, 0, 5); pw.write(s, 6, 5); // flush the writer pw.flush(); } catch (Exception ex) { ex.printStackTrace(); } } } HelloWorld rt Comment More infoAdvertise with us Next Article Must Do Coding Questions - Topic-wise K kartik Improve Article Tags : Java Java-I/O Practice Tags : Java Similar Reads Interview PreparationInterview Preparation For Software DevelopersMust Coding Questions - Company-wise Must Do Coding Questions - Topic-wiseCompany-wise Practice ProblemsCompany PreparationCompetitive ProgrammingSoftware Design-PatternsCompany-wise Interview ExperienceExperienced - Interview ExperiencesInternship - Interview ExperiencesPractice @GeeksforgeeksProblem of the DayTopic-wise PracticeDifficulty Level - SchoolDifficulty Level - BasicDifficulty Level - EasyDifficulty Level - MediumDifficulty Level - HardLeaderboard !!Explore More...Data StructuresArraysLinked ListStackQueueBinary TreeBinary Search TreeHeapHashingGraphAdvance Data StructuresMatrixStringAll Data StructuresAlgorithmsAnalysis of AlgorithmsSearching AlgorithmsSorting AlgorithmsPattern SearchingGeometric AlgorithmsMathematical AlgorithmsRandomized AlgorithmsGreedy AlgorithmsDynamic ProgrammingDivide & ConquerBacktrackingBranch & BoundAll AlgorithmsProgramming LanguagesCC++JavaPythonC#Go LangSQLPHPScalaPerlKotlinWeb TechnologiesHTMLCSSJavaScriptBootstrapTailwind CSSAngularJSReactJSjQueryNodeJSPHPWeb DesignWeb BrowserFile FormatsComputer Science SubjectsOperating SystemsDBMSComputer NetworkComputer Organization & ArchitectureTOCCompiler DesignDigital Elec. & Logic DesignSoftware EngineeringEngineering MathematicsData Science & MLComplete Data Science CourseData Science TutorialMachine Learning TutorialDeep Learning TutorialNLP TutorialMachine Learning ProjectsData Analysis TutorialTutorial LibraryPython TutorialDjango TutorialPandas TutorialKivy TutorialTkinter TutorialOpenCV TutorialSelenium TutorialGATE CSGATE CS NotesGate CornerPrevious Year GATE PapersLast Minute Notes (LMNs)Important Topic For GATE CSGATE CoursePrevious Year Paper: CS exams Like