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tonyh發表於 2018-12-3 19:47 | 只看該作者

陣列的長度

利用length屬性, 可取得陣列的長度, 即該陣列包含了幾位成員.

int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};

上列三個陣列長度分別為何呢?

public class Ch41
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length); //4
System.out.println(b.length); //3
System.out.println(c.length); //2
}
}

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2^#

李沛昂發表於 2018-12-3 20:24 | 只看該作者

public class Pig
{
public static void main(String pigs[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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3^#

曾堂桂發表於 2018-12-3 20:25 | 只看該作者

public class Ch41
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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4^#

黃宇瑄發表於 2018-12-3 20:26 | 只看該作者

public class Ch02
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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Ivy

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5^#

黃宇綸發表於 2018-12-3 20:26 | 只看該作者

public class Ch01
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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Allen

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6^#

洪翊庭發表於 2018-12-3 20:28 | 只看該作者

public class Ch41
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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7^#

洪翊展發表於 2018-12-3 20:31 | 只看該作者

public class Ch01
{
public static void main(String args[])
{
int a[]={1,2,3,4};
int b[][]={{1,2,3,4},{1,2,3,4},{1,2,3,4}};
int c[][][]={{{1,2,3,4},{1,2,3,4},{1,2,3,4}},{{1,2,3,4},{1,2,3,4},{1,2,3,4}}};
System.out.println(a.length);
System.out.println(b.length);
System.out.println(c.length);
}
}

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