in System java method

package test;


import java.util.*;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.locks.Lock;

import javax.print.attribute.IntegerSyntax;

import org.omg.CosNaming.NamingContextExtPackage.AddressHelper;

import privateclass.*;
import java.io.*;

public class Main {

	private static final String space_operator = " ";
	public static void main(String[] args) throws Exception {

		Scanner scanner = new Scanner(new BufferedInputStream(System.in));
		//PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
		
		TreeMap<Character,Integer> hashMap = new TreeMap<Character,Integer>();
		
		long time1 = System.currentTimeMillis();
		= String String "dsddd SDZ --gdfg the dbx"; 
		the Properties MES = System.getProperties ();
		for (int I = 0; I <String.length (); I ++) { 
			Integer valueInteger = HashMap.get (String.charAt (I)); 
			(! Character.isAlphabetic (String.charAt (I))) IF Continue; 
			
			COUNT. 1 = int; 
			IF (! valueInteger = null) 
			{ 
				COUNT = valueInteger +. 1; 
			} 
			hashMap.put (String.charAt (I), COUNT); 

		} 
		
	
		
		System.out.println (hashMap '); 
		
		// time acquisition    time is from the time 1970 
		Long TIME2 = System.currentTimeMillis (); 
		
		
		System.out.println (TIME2 - TIME1); 
		
		/ * 
		 * get system information 
		 * / 
		/ * 
		for (Object name: mes.keySet ()) 
		{ 
			System.out.println (name + "::" + mes.getProperty ((String) name)); 
		} 
		* / 
		
		/ * 
		 * get newline system used directly newline for different system 
		 * / 
		Final LINE_SEPARATOR String = System.getProperty ( "line.separator"); 
		System.out.println ( "the Hello" + LINE_SEPARATOR + "Word"); 
		
		
		/ * 
		 * may set up their own system properties 
		 * / 
		System.setProperty ( "MyClass", "tiantian"); 
		
	} 
	
}

  

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Origin www.cnblogs.com/WINDZLY/p/11788708.html