console java

控制臺類format()方法 (Console Class format() method)

• format() method is available in java.io package.

  format()方法在java.io包中可用。

• format() method is used to write the formatted string to this Console with the help of the given string format and object parameters.

  format()方法用于在給定的字符串格式和對象參數(shù)的幫助下將格式化的字符串寫入此控制臺。

• format() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  format()方法是一個非靜態(tài)方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• format() method may throw an exception at the time of formatting this Console.

  在格式化此控制臺時， format()方法可能會引發(fā)異常。

  IllegalFormatException: This exception may throw when a given string format is not valid.

  IllegalFormatException ：如果給定的字符串格式無效，則可能引發(fā)此異常。

Syntax:

句法：

public Console format(String frmt, Object... params);

Parameter(s):

參數(shù)：

• String frmt – represents the format string as defined in the Format string.

  字符串frmt –表示格式字符串中定義的格式字符串。

• Object... params – represents the parameters addressed by the format specifiers in the format string.

  對象...參數(shù) –表示格式字符串中格式說明符所尋址的參數(shù)。

Return value:

返回值：

The return type of the method is Console, it returns this Console.

方法的返回類型為Console ，它將返回此Console。

Example:

例：

// Java program to demonstrate the example // of Console format(String frmt , Object… params) // method of Consoleimport java.io.*;public class FormatOfConsole {public static void main(String[] args) {try {// Instantiates Console Console con = System.console();// Define a string format for rows and columnsString frmt = "%1$15s %2$20s %3$20s%n";// By using format() method isto format the// the given string in rows and columncon.format(frmt, "Student_Name", "Student_Add", "Student_ph");con.format(frmt, "Preeti", "Delhi", "9425667852");con.format(frmt, "Rahul", "Delhi", "8871459682");con.format(frmt, "Shreya", "Delhi", "7216589745");con.format(frmt, "Rama", "Bangalore", "8871568492");con.format(frmt, "Anjali", "London", "8872589261");} catch (Exception ex) {System.out.println(ex.toString());}} }

Output

輸出量

Student_Name Student_Add Student_phPreeti Delhi 9425667852Rahul Delhi 8871459682Shreya Delhi 7216589745Rama Bangalore 8871568492Anjali London 8872589261

翻譯自: https://www.includehelp.com/java/console-format-method-with-example.aspx

console java

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