Java 中的 PrintStream close()方法，示例
原文:https://www . geesforgeks . org/print stream-close-method-in-Java-with-examples/
Java 中 PrintStream 类的 close() 方法用于关闭该流。关闭流会释放流中的任何值或与之关联的任何资源。PrintStream 实例一旦关闭就不起作用了。此外，打印流实例一旦关闭，就不能再次关闭。
语法:
public void close()
参数:该方法不接受任何参数。
返回值:此方法不返回值。它只是关闭了流。
下面的方法说明了 close()方法的工作原理:
程序 1:
// Java program to demonstrate
// PrintStream close() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
// The string to be written in the Stream
String str = "GeeksForGeeks";
try {
// Create a PrintStream instance
PrintStream stream
= new PrintStream(System.out);
// Write the above string to this stream
// This will put the string in the stream
// till it is printed on the console
stream.print(str);
// Now close the stream
// using close() method
stream.close();
}
catch (Exception e) {
System.out.println(e);
}
}
}
Output:
GeeksForGeeks
程序 2:
// Java program to demonstrate
// PrintStream close() method
import java.io.*;
class GFG {
public static void main(String[] args)
{
try {
// Create a PrintStream instance
PrintStream stream
= new PrintStream(System.out);
// Write the char to this stream
// This will put the char in the stream
// till it is printed on the console
stream.write(65);
// Now close the stream
// using close() method
stream.close();
}
catch (Exception e) {
System.out.println(e);
}
}
}
Output:
A
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