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How to open specified exe file in java

王林
Release: 2019-11-30 09:22:54
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How to open specified exe file in java

知识补充:

Runtime:运行时,是一个封装了JVM进程的类。每一个JAVA程序实际上都是启动了一个JVM进程,那么每一个进程都是对应这一个Runtime实例,其实例是由JVM为其初始化的。

Runtime类的常用方法

public static Runtime getRuntime():普通方法  用于取得Runtime类的实例

public long freeMemory():普通方法 用于返回Java虚拟机中的空闲内存

public long maxMemory():返回JVM的最大内存量

public void gc():运行垃圾回收器、释放空间

public Process exec(String command) throws IOException 执行本机命令

一旦取得实例后,以上的方法就可以进行操作了。

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示例如下:

 
	public static void main(final String[] args) throws IOException {
		openWindowsExe();
		openExe();
		openFile();
	}
 
	// 用 Java 调用windows系统的exe文件,比如notepad,calc之类
	public static void openWindowsExe() {
		final Runtime runtime = Runtime.getRuntime();
		Process process = null;
		try {
			final String command = "notepad";// 记事本
			process = runtime.exec(command);
		} catch (final Exception e) {
			System.out.println("Error win exec!");
		}
	}
 
	// 调用其他的可执行文件,例如:自己制作的exe,或是 下载 安装的软件.
	public static void openExe() {
		final Runtime runtime = Runtime.getRuntime();
		Process process = null;
 
		try {
			process = runtime.exec("C:\\Program Files\\Notepad++\\notepad++.exe");
 
		} catch (final Exception e) {
			System.out.println("Error exec!");
		}
	}
 
	// 打开其他任意格式的文件,比如txt,word等
	public static void openFile() {
		final Runtime runtime = Runtime.getRuntime();
		Process process = null;//
		final String cmd = "rundll32 url.dll FileProtocolHandler file://F:\\ECT项目资料\\建立EMF工程.txt";
		try {
			process = runtime.exec(cmd);
		} catch (final Exception e) {
			System.out.println("Error exec!");
		}
	}
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