for (int i = 0; i < paraLen; i++) {
String index = String.valueOf(i);
//out.print(ia[i]+":"+ib[i]+":"+ic[i]+"<br>");
paraStr += "<param name = \"ia" + index + "\" value=\"" + ia[i] + "\">\n";
paraStr += "<param name = \"ib" + index + "\" value=\"" + ib[i] + "\">\n";
paraStr += "<param name = \"ic" + index + "\" value=\"" + ic[i] + "\">\n";
paraStr += "<param name = \"va" + index + "\" value=\"" + va[i] + "\">\n";
paraStr += "<param name = \"vb" + index + "\" value=\"" + vb[i] + "\">\n";
paraStr += "<param name = \"vc" + index + "\" value=\"" + vc[i] + "\">\n";
paraStr += "<param name = \"yg" + index + "\" value=\"" + yg[i] + "\">\n";
paraStr += "<param name = \"wg" + index + "\" value=\"" + wg[i] + "\">\n";
paraStr += "<param name = \"yz" + index + "\" value=\"" + yz[i] + "\">\n";
paraStr += "<param name = \"wz" + index + "\" value=\"" + wz[i] + "\">\n";
paraStr += "<param name = \"yf" + index + "\" value=\"" + yf[i] + "\">\n";
paraStr += "<param name = \"wf" + index + "\" value=\"" + wf[i] + "\">\n";
// System.out.println(va[i]);
}
就是这样一个for循环,ParaLen最大为96,执行时间居然要一秒多,那位能给我优化一下吗?
其中那些数组(如ia ib ic .....)是float数组。
String index = String.valueOf(i);
//out.print(ia[i]+":"+ib[i]+":"+ic[i]+"<br>");
paraStr += "<param name = \"ia" + index + "\" value=\"" + ia[i] + "\">\n";
paraStr += "<param name = \"ib" + index + "\" value=\"" + ib[i] + "\">\n";
paraStr += "<param name = \"ic" + index + "\" value=\"" + ic[i] + "\">\n";
paraStr += "<param name = \"va" + index + "\" value=\"" + va[i] + "\">\n";
paraStr += "<param name = \"vb" + index + "\" value=\"" + vb[i] + "\">\n";
paraStr += "<param name = \"vc" + index + "\" value=\"" + vc[i] + "\">\n";
paraStr += "<param name = \"yg" + index + "\" value=\"" + yg[i] + "\">\n";
paraStr += "<param name = \"wg" + index + "\" value=\"" + wg[i] + "\">\n";
paraStr += "<param name = \"yz" + index + "\" value=\"" + yz[i] + "\">\n";
paraStr += "<param name = \"wz" + index + "\" value=\"" + wz[i] + "\">\n";
paraStr += "<param name = \"yf" + index + "\" value=\"" + yf[i] + "\">\n";
paraStr += "<param name = \"wf" + index + "\" value=\"" + wf[i] + "\">\n";
// System.out.println(va[i]);
}
就是这样一个for循环,ParaLen最大为96,执行时间居然要一秒多,那位能给我优化一下吗?
其中那些数组(如ia ib ic .....)是float数组。
解决方案 »
- 这几段代码没有看懂,帮忙看一下
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- 只有几行代码,大家帮看看.看不懂
String 是一个“不可改变”对象,你每做一次"+"动作都需要创建一个新的String对象。
for (int i = 0; i < paraLen; i++) {
//String index = String.valueOf(i);
//out.print(ia[i]+":"+ib[i]+":"+ic[i]+"<br>");
paraStr.append("<param name = \"ia" + i + "\" value=\"" + ia[i] + "\">\n");
paraStr.append("<param name = \"ib" + i + "\" value=\"" + ib[i] + "\">\n");
paraStr.append("<param name = \"ic" + i + "\" value=\"" + ic[i] + "\">\n");
paraStr.append("<param name = \"va" + i + "\" value=\"" + va[i] + "\">\n");
paraStr.append("<param name = \"vb" + i + "\" value=\"" + vb[i] + "\">\n");
paraStr.append("<param name = \"vc" + i + "\" value=\"" + vc[i] + "\">\n");
paraStr.append("<param name = \"yg" + i + "\" value=\"" + yg[i] + "\">\n");
paraStr.append("<param name = \"wg" + i + "\" value=\"" + wg[i] + "\">\n");
paraStr.append("<param name = \"yz" + i + "\" value=\"" + yz[i] + "\">\n");
paraStr.append("<param name = \"wz" + i + "\" value=\"" + wz[i] + "\">\n");
paraStr.append("<param name = \"yf" + i + "\" value=\"" + yf[i] + "\">\n");
paraStr.append("<param name = \"wf" + i + "\" value=\"" + wf[i] + "\">\n");
// System.out.println(va[i]);
}
String para=paraStr.toString();