我有一个JTextField。我希望在用户输入的每个字符之后,一个方法调用并在同一个JTextField中更改字符的顺序,但是在我的代码中displayArrestNo2()方法调用并在consol中打印正确答案但是不要更新内容JTextField.How可以做到吗?
public static void main(String args[]) {
final JTextField textField = new JTextField();
textField.setSize(100, 100);
textField.getDocument().addDocumentListener(new DocumentListener() {
public void changedUpdate(DocumentEvent e) {
}
public void removeUpdate(DocumentEvent e) {
}
public void insertUpdate(DocumentEvent e) {
try{
Stringx=displayArrestNo2(e.getDocument().getText(0,e.getDocument().getLength()));
System.out.println(x);
}catch(Exception ex){
ex.printStackTrace();
}
}
public void warn() {
}
public String displayArrestNo2(String aValue){
System.out.println("oroginal value: " + aValue);
aValue = " "+aValue+" ";
System.out.println("space added value: "+aValue);
final String validStr = " ابپتثجچحخدرزژسشصضطظعغفقکگلمنوهیي";
int lPos, fPos, i, j, k;
boolean flgEnterIntSection, lastWasChar;
String result = "";
flgEnterIntSection= false;
lastWasChar = false;
lPos = 0;
i = aValue.length()-1;
while( i >= 0) {
char[] aValueArr = aValue.toCharArray();
/* char[] tmpArr = aValue.toCharArray();
char[] aValueArr = new char[tmpArr.length];
for(int x=0; x<tmpArr.length; x++)
aValueArr[x]= tmpArr[tmpArr.length-x-1]; */
if (aValueArr[i] == 'ß')
aValueArr[i] = '˜';
if (convert(aValueArr[i]) == -1)
{
if(validStr.indexOf(aValueArr[i]) > 0)
{
j = 0;
while ( ( (i - j) > 0) && (validStr.indexOf(aValueArr[i-j]) > 0 ))
j = j + 1;
if (j >1)//j>1
{
k = j;
while (j > 0)
{
result = result + aValueArr[i - j+1];//i-j+1
j--;
}
i = i - k+1;//i-k+1
}
else
result = result + aValueArr[i];
}
else
result = result + aValueArr[i];
i--;
flgEnterIntSection = false;
}
else
{
fPos = i;
j = i;
while ((j >= 0) && ((!flgEnterIntSection) || (convert(aValueArr[j]))!=-1))// (StrToIntDef(AValue[j], -1) <> -1)
{
flgEnterIntSection = true;
while ((j >= 0) && (convert(aValueArr[j]))!=-1) // StrToIntDef(AValue[j], -1) <> -1)
j--;
if ((j > 0) && ((aValueArr[j] == '.') || (aValueArr[j] == '/')) )
if (((j-1) >= 0) && (convert(aValueArr[j-1]))!=-1) //StrToIntDef(AValue[j - 1], -1) <> -1)
j--;
}
lPos = j + 1;
for (j = lPos; j <= fPos; j++)
{
result = result + aValueArr[j];
}
i = lPos-1;
}
}
// return result;
// System.out.println("before reverse "+result);
return reverseOrder(result);
}
String reverseOrder(String input){
String [] inArr = input.split(" ");
String reversed = "";
for(int i = inArr.length-1; i>=0; i--){
reversed += inArr[i] + " ";
}
return reversed;
}
public int convert(char ch) {
try {
int m = Integer.parseInt(String.valueOf(ch));
return m;
} catch (Exception e) {
return -1;
}
}
TestJTextField x=new TestJTextField();
x.add(textField);
x.setVisible(true);
}
在insertUpdate()方法中,每个字符调用displayArrestNo2()但不改变JTextField的内容。