java 关键字
java 关键字如下:
http://docs.oracle.com/javase/tutorial/java/nutsandbolts/_keywords.html
Here is a list of keywords in the Java programming language. You cannot use any of the following as identifiers in your programs. The keywords const and goto are reserved, even though they are not currently used. true, false, and null might seem like keywords, but they are actually literals; you cannot use them as identifiers in your programs.
abstract continue for new switch
assert*** default goto* package synchronized
boolean do if private this
break double implements protected throw
byte else import public throws
case enum**** instanceof return transient
catch extends int short try
char final interface static void
class finally long strictfp** volatile
abstract continue for new switch
assert*** default goto* package synchronized
boolean do if private this
break double implements protected throw
byte else import public throws
case enum**** instanceof return transient
catch extends int short try
char final interface static void
class finally long strictfp** volatile
const* float native super while
* not used
** added in 1.2
*** added in 1.4
**** added in 5.0
const and goto是保留字。
true, false, and null是常量。
public class Test { public static void main(String[] args) { for (int i =1;i<=args.length;i++ ) { System.out.printf("%-20s",args[i-1]); if(i%5==0){ System.out.println(""); } } } }