我正在尝试构建一个矩阵行和列有值为“aaa”为对齐目的。但是当我运行它我得到一个错误任何人都可以告诉我我要去哪里错了,如何修复it.below是我的代码为什么我是这个错误
public class compute_matrix {
static String seq1="aaa";
static String seq2="aaa";
static int[][] matrix;
static int max_row;
static int max_col;
private static int match_reward=1;
private static int mismatch_penalty= -1;
private static int gap_cost= -1;
private static boolean case_sensitive;
private static boolean isCaseSensitive() {
return case_sensitive;
}
private static int max(int ins, int sub, int del, int i) {
if (ins > sub) {
if (ins > del) {
return ins > i? ins : i;
} else {
return del > i ?del : i;
}
} else if (sub > del) {
return sub> i ? sub : i;
} else {
return del > i ? del : i;
}
}
protected char sequence[];
public static void main(String args[]){
int r, c, rows, cols, ins, sub, del, max_score;
rows = seq1.length()+1;
cols = seq2.length()+1;
matrix = new int [rows][cols];
// initiate first row
for (c = 0; c < cols; c++)
matrix[0][c] = 0;
// keep track of the maximum score
max_row = max_col = max_score = 0;
// calculates the similarity matrix (row-wise)
for (r = 1; r < rows; r++)
{
// initiate first column
matrix[r][0] = 0;
for (c = 1; c < cols; c++)
{
sub = matrix[r-1][c-1] + scoreSubstitution(seq1.charAt(r),seq2.charAt(c));
ins = matrix[r][c-1] + scoreInsertion(seq2.charAt(c));
del = matrix[r-1][c] + scoreDeletion(seq1.charAt(r));
// choose the greatest
matrix[r][c] = max (ins, sub, del, 0);
if (matrix[r][c] > max_score)
{
// keep track of the maximum score
max_score = matrix[r][c];
max_row = r; max_col = c;
}
}
}
}
private static int scoreSubstitution(char a, char b) {
if (isCaseSensitive())
if (a == b)
return match_reward;
else
return mismatch_penalty;
else
if (Character.toLowerCase(a) == Character.toLowerCase(b))
return match_reward;
else
return mismatch_penalty;
}
private static int scoreInsertion(char a) {
return gap_cost;
}
private static int scoreDeletion(char a) {
return gap_cost;
}
public char charAt (int pos)
{
// convert from one-based to zero-based index
return sequence[pos-1];
}
}
,我的错误是显示这个
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 3
at java.lang.String.charAt(String.java:695)
at compute_matrix.main(compute_matrix.java:67)
Java结果:1
您是一位学习Java的Visual Basic程序员吗? – Wug
你最好自己调试你的问题。 –