Java 中 PrintWriter flush()方法，示例
原文:https://www . geesforgeks . org/print writer-flush-method-in-Java-with-examples/
Java 中 PrintWriter 类的 flush() 方法用于冲刷溪流。通过冲洗流，这意味着清除流中可能存在或可能不存在的任何元素。它既不接受任何参数，也不返回值。
语法:
public void flush()
参数:该方法不接受任何参数。
返回值:此方法不返回值。它只是冲向溪流。
下面的方法说明了 flush()方法的工作原理:
程序 1:
// Java program to demonstrate
// PrintWriter flush() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
// The string to be written in the Writer
String str = "GeeksForGeeks";
try {
// Create a PrintWriter instance
PrintWriter writer
= new PrintWriter(System.out);
// Write the above string to this writer
// This will put the string in the stream
// till it is printed on the console
writer.write(str);
// Now clear the stream
// using flush() method
writer.flush();
}
catch (Exception e) {
System.out.println(e);
}
}
}
Output:
GeeksForGeeks
程序 2:
// Java program to demonstrate
// PrintWriter flush() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
try {
// Create a PrintWriter instance
PrintWriter writer
= new PrintWriter(System.out);
// Write the char to this writer
// This will put the char in the stream
// till it is printed on the console
writer.write(65);
// Now clear the stream
// using flush() method
writer.flush();
}
catch (Exception e) {
System.out.println(e);
}
}
}
Output:
A
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