我只想通过打印我的空数组循环。
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
有什么问题?
int NYEARS = 5;
int NRATES = 3;
double[][] balancee = new double[NYEARS][NRATES];
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[NYEARS][NRATES] + " ");
System.out.println();
}
}
答案 0 :(得分:1)
您应该使用循环索引来访问数组元素,而不是数组维度:
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[i][j] + " ");
System.out.println();
}
}
答案 1 :(得分:1)
您的解决方案会导致java.lang.ArrayIndexOutOfBoundsException: 5
您输入错误balance
而不是balancee
:
所以相反,你必须使用balancee.length
和balancee[i].length
而不是balance[NYEARS][NRATES]
,所以你必须像这样使用balancee[i][j]
:
for (int i = 0; i < balancee.length; i++) {
for (int j = 0; j < balancee[i].length; j++) {
System.out.print(balancee[i][j] + " ");
System.out.println();
}
}
答案 2 :(得分:1)
当我不需要使用索引进行算术运算时,我更喜欢 foreach
for (double[] x : balancee) {
for (double y : x) {
System.out.print(y + " ");
}
System.out.println();
}
更重要的是,我希望你明白为什么你不能使用balance[NYEARS][NRATES]
。
答案 3 :(得分:0)
只需使用内置的Arrays.deepToString()
int[][] foo = { null, {}, { 1 }, { 2, 3 } };
System.out.println(Arrays.deepToString(foo));
输出
[null, [], [1], [2, 3]]
答案 4 :(得分:0)
int NYEARS = 5; //This is the size
int NRATES = 3; //This is the size
double[][] balancee = new double[NYEARS][NRATES]; //<-- balancee vs balance
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[NYEARS][NRATES] + " "); //<-- use i and j instead of size.
System.out.println();
}
}