Java.io.PrintWriter.println float() 方法 Java.io.PrintWriter.println int() 方法 Java.io.PrintWriter.println long() 方法 Java.io.PrintWriter.println float() 方法 package com.codingdict; import java.io.*; public class PrintWriterDemo { public static void main(String[] args) { float f = 123.456f; // create a new writer PrintWriter pw = new PrintWriter(System.out); // print float pw.println(f); pw.println(987.765f); // flush the writer pw.flush(); } } Java.io.PrintWriter.println int() 方法 Java.io.PrintWriter.println long() 方法