$BA0@a(B$B$^$G$G!"(B$BJQ?t(B$B$H$O2?$G$"$k$N$+$r>R2p$7$^$7$?!#K\@a$+$i$O!"J#?t$NJQ?t$r0l2t$H$7$F07$&!"!VG[Ns!W$K$D$$$F>R2p$7$^$9!#(B
$BDL>o!"C1$KJQ?t$H$$$&$H!"CM$O0l$D$7$+;}$F$^$;$s!#$G$O!"EEOCHV9f$r#58D07$&>l9g$O!"$I$s$JJQ?t$,I,MW$G$7$g$&$+!)(B
$B0F#1!'(B String tel1, tel2, tel3, tel4, tel5;
$B4V0c$C$F$O$$$^$;$s$,!"$$$+$K$bH~$7$/$"$j$^$;$s!#$=$3$GEP>l$9$k$N$,(B$BG[Ns(B$B$G$9!#G[Ns$J$i$P!"
String[] tels; // $B@k8@(B tels = new String[5]; // $B@8@.(B
$B$3$l$G!"(B tels[0]
$B$+$i(B tels[4]
$B$^$G#5$D$NJQ?t$,<+F0E*$K:n@.$5$l$^$7$?!#$3$l$i$NJQ?t$r$^$H$a$F;2>H$9$k$H$-$OJQ?t(B tels
$B$r;H$$$^$9!#CM$NBeF~$OIaDL$NJQ?t$HF1$8$h$&$K9T$$$^$9!#(B
$B3Q3g8L$OG[NsJQ?tL>(B tels
$B$K$/$C$D$1$F=q$$$F$bF1$8$G$9!'(B
String tels[]; // $B@k8@(B tels = new String[5]; // $B@8@.(B
$B@k8@$H@8@.$rJ,$1$F=q$-$^$7$?$,!"4pK\%G!<%?7?JQ?t$N@k8@$H=i4|2=$HF1$8$/!"
String[] tels1 = new String[5]; String tels2[] = new String[5]; // $B$I$A$i$bF1$8(B
$BG[Ns$NDj5AJ}K!$r$^$H$a$^$9!'(B
$B%G!<%?7?L>(B[] $BJQ?tL>(B;
$BKt$O(B $B%G!<%?7?L>(B $BJQ?tL>(B[];
$BJQ?tL>(B = new $B%G!<%?7?L>(B[$BMWAG$N8D?t(B];
$BJQ?tL>(B[$B%$%s%G%C%/%9(B] = $BCM(B;
0
$B$+$i;O$^$j$^$9!#=>$C$F!"G[Ns$r(B new
$B$9$k$H$-$K;XDj$7$?MWAG$N8D?t$r(B N
$B8D$@$H$9$k$H!"%$%s%G%C%/%9$G;XDj2DG=$J?tCM$O!"(B 0
$B$+$i(B N-1
$B$G$9!#(BTestArray.java
:
class TestArray { public static void main(String[] args) { String[] aStr; aStr = new String[2]; aStr[0] = "$B$3$s$K$A$O(B"; aStr[1] = "$B$5$h$&$J$i(B"; System.out.println("$B=P2q$$!'(B" + aStr[0]); System.out.println("$BJL$l!'(B" + aStr[1]); } }
$B%G!<%?7?$,(B String
$B$NG[Ns(B aStr[]
$B$,:n@.$5$l$F$$$^$9!#MWAG?t$O#2$D!J(BaStr[0]
$B$H(B aStr[1]
$B!K$G$9!#(B
C:\java>javac TestArray.java C:\java>java TestArray $B=P2q$$!'$3$s$K$A$O(B $BJL$l!'$5$h$&$J$i(B C:\java>
Srintg[] args
- $B%3%^%s%I%i%$%s0z?t(B$B$G$O!"(B main()
$B%a%=%C%I$N0z?t$K;XDj$5$l$F$$$kG[Ns(B Srintg[] args
$B$O2?$N$?$a$N$b$N$G$7$g$&!)(B
$BEz$($O!"%3%^%s%I%i%$%s0z?t$G$9!#%3%^%s%I%i%$%s$+$i!"(B Java $B%"%W%j%1!<%7%g%s$K%Q%i%a%?$rEO$9$3$H$,=PMh$^$9!#(B
$B%3%^%s%I%i%$%s0z?t$O!"(B main()
$B%a%=%C%IFb$GMxMQ$G$-$k%Q%i%a%?$rM?$($k;EAH$_$G$9!#%3%^%s%I(B $B%i%$%s$Gargs
$B$KBeF~$5$l$^$9!#Nc$($P!"%3%^%s%I(B $B%i%$%s$+$iEO$5$l$?J8;zNs$N:G=i$N$b$N$O(B args[0]
$B$G;2>H$G$-$^$9!#(B
TestArgs.java
:
class TestArgs { public static void main(String[] args) { System.out.print(args[0]); } }
$B>e$N%5%s%W%k$O!"%3%^%s%I%i%$%s0z?t$NBh0lHVL\$N$b$N$r=PNO$7$^$9!#(B
$B
C:\java>javac TestArgs.java C:\java>java TestArgs Hello! Hello! C:\java>
$B4|BTDL$j$N7k2L$G$9!#$B$3$s$K$A$O!*(B $B$rM?$($?$b$N$G$9!#(B
C:\java>java TestArgs $B$3$s$K$A$O!*(B $B$3$s$K$A$O!*(B
$B$3$NNc$G8+$?$H$*$j!"0z?t$rJQ$($k$H!"%=!<%9%3!<%I$r=q$-49$($J$/$F$b!"
$B
Multiply.java
:
class Multiply { public static void main(String[] args) { double a = Double.parseDouble(args[0]); double b = 1.05; System.out.println(a * b); } }
$B%3%^%s%I%i%$%s0z?t$r(B args[0]
$B$G;2>H$7$F$$$^$9!#(BDouble.parseDouble()
$B$O!"(B String
$B7?$NCM$rFIargs[0]
$B$r(B double $B7?$K2ra $B$KBeF~$5$l$^$9!#(B
$B
C:\java>javac Multiply.java
C:\java>java Multiply 100
105.0
C:\java>java Multiply 1980
2079.0
b
$B$NCM$O%W%m%0%i%`$NCf$K(B 1.05 $B$H=q$-9~$s$G$7$^$$$^$7$?!#$3$NCM$b%3%^%s%I%i%$%s0z?t$+$iBeF~$9$k$h$&$KJQ99$7$F$_$^$7$g$&!#(B
Multiply2.java
:
class Multiply2 { public static void main(String[] args) { double a = Double.parseDouble(args[0]); double b = Double.parseDouble(args[1]); System.out.println(a * b); } }
$B%3%^%s%I%i%$%s0z?t$N#2HVL\$N$b$N$,(B args[1]
$B$G;2>H$5$l!"$=$NCM$r(B double $B7?$K2rb $B$KBeF~$5$l$^$9!#(B
$Bargs[?]
$B$KBeF~$5$l$k$3$H$K$J$j$^$9!#(B
C:\java>javac Multiply2.java C:\java>java Multiply2 100 0.5 50.0 C:\java>java Multiply2 980 4 3920.0 C:\java>
ArrayIndexOutOfBoundsException
$B>e$N%5%s%W%k$K2?$b0z?t$rM?$($J$$$G $B2?$b0z?t$rM?$($F$$$J$$$N$G!"G[Ns$,:n$i$l$F$$$J$$$N$G$9$,!"Bh0l0z?t$r=PNO$7$h$&$H$7$?$+$iH/@8$7$?>u67$G$9!#L5$$$b$N$r$h$3$;$H8@$C$?$h$&$J$b$N$G$9!#(B "ArrayIndexOutOfBoundsException" $B$H$$$& $BG[Ns$O!"%W%m%0%i%_%s%08@8l$J$i$P!"I,MWIT2D7g$J$b$N$G$9!#$^$?!"%3%^%s%I%i%$%s$+$i0z?t$r
C:\java>java TestArgs
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException
at TestArgs.main(TestArgs.java:3)
C:\java>
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