systeminexp.java

来自「一个类似C中的printl 开源的Java 文件」· Java 代码 · 共 45 行

package com.kettas.common.expt;
import java.io.*;

public class SystemInExp{
	public static int readInt() throws IllegalArgumentException{
		BufferedReader br = null;
		try{
			br = new BufferedReader( new InputStreamReader( System.in) ) ;
			String line = br.readLine();
			int ret = Integer.parseInt( line );
			return ret ;	
		}catch( Exception e ){
			throw new IllegalArgumentException( e );
		}finally{
			if( br != null ) try{ br.close();}catch( Exception e ){}
		}	
	}	
	
	public static double readDouble() throws IllegalArgumentException{
		BufferedReader br = null;
		try{
			br = new BufferedReader( new InputStreamReader( System.in) ) ;
			String line = br.readLine();
			double ret = Double.parseDouble( line );
			return ret ;	
		}catch( Exception e ){
			throw new IllegalArgumentException( e );
		}finally{
			if( br != null ) try{ br.close();}catch( Exception e ){}
		}	
	}
	
	public static String readString(){
		BufferedReader br = null;
		try{
			br = new BufferedReader( new InputStreamReader( System.in) ) ;
			String line = br.readLine();
			return line ;	
		}catch( Exception e ){
			throw new IllegalArgumentException(e);
		}finally{
			if( br != null ) try{ br.close();}catch( Exception e ){}
		}	
	}
}