刚学习JAVA,这段简单程序为什么不能通过? 保存文件名为Property.javajavac Property.javajava Property 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 改成这样,把try那段去掉:import java.util.*;public class Property { public static void main(String[] args) { System.out.println(new Date()); Properties p = System.getProperties(); p.list(System.out); System.out.println("--- Memory Usage:"); Runtime rt = Runtime.getRuntime(); System.out.println("Total Memory = " + rt.totalMemory() + " Free Memory = " + rt.freeMemory()); }} 正确的:import java.util.*;public class Property { public static void main(String[] args) { System.out.println(new Date()); Properties p = System.getProperties(); p.list(System.out); System.out.println("--- Memory Usage:"); Runtime rt = Runtime.getRuntime(); System.out.println("Total Memory = " + rt.totalMemory() + " Free Memory = " + rt.freeMemory()); try { Thread.currentThread().sleep(5 * 1000); } catch(InterruptedException e) {} } } import java.util.*;public class Property { public static void main(String[] args) { System.out.println(new Date()); Properties p = System.getProperties(); p.list(System.out); System.out.println("--- Memory Usage:"); Runtime rt = Runtime.getRuntime(); System.out.println("Total Memory = " + rt.totalMemory() + " Free Memory = " + rt.freeMemory()); try {Thread.currentThread().sleep(5 * 1000);} catch(InterruptedException e) {}}}改了一下,好用了,多了个'}',把try放到main里 文件解决了,是因为我将程序随便起了一个名字1.java结果编译不通过,改为Property.java就可以了。 ListIterator 迭代器中的返回索引的 previousIndex() 方法 高手,怎么重写writeStreamHeader 求新手JAVA编程软件 什么是第三方包? checkbox单选,点击两次后怎么让不选中!? 我快疯了!帮帮我好吗? 我在一家网吧上网,我想在我用的机器上下载JDK1.4 但是一重启后就全没了。。? 关于applet的问题?(50) 抽象类是否不允许继承呢? 关于在提取数据库时,有不同类型的字段会发生错误?这是什么原因? .rar的文件如何打开???急 jbuilder恢复以前的版本,怎样加入history,怎样恢复到某一版本?
import java.util.*;public class Property {
public static void main(String[] args) {
System.out.println(new Date());
Properties p = System.getProperties();
p.list(System.out);
System.out.println("--- Memory Usage:");
Runtime rt = Runtime.getRuntime();
System.out.println("Total Memory = "
+ rt.totalMemory()
+ " Free Memory = "
+ rt.freeMemory());
}
}
import java.util.*;public class Property {
public static void main(String[] args) {
System.out.println(new Date());
Properties p = System.getProperties();
p.list(System.out);
System.out.println("--- Memory Usage:");
Runtime rt = Runtime.getRuntime();
System.out.println("Total Memory = "
+ rt.totalMemory()
+ " Free Memory = "
+ rt.freeMemory());
try {
Thread.currentThread().sleep(5 * 1000);
} catch(InterruptedException e) {}
}
}
public static void main(String[] args) {
System.out.println(new Date());
Properties p = System.getProperties();
p.list(System.out);
System.out.println("--- Memory Usage:");
Runtime rt = Runtime.getRuntime();
System.out.println("Total Memory = "
+ rt.totalMemory()
+ " Free Memory = "
+ rt.freeMemory());
try {
Thread.currentThread().sleep(5 * 1000);
} catch(InterruptedException e) {}
}
}
改了一下,好用了,多了个'}',把try放到main里