本文实例为大家分享了java实现查找替换功能的具体代码，供大家参考，具体内容如下

查找

if(searchTxt.getText().equals("")){ JOptionPane.showMessageDialog(null, "查找内容不能为空！"); }else if(!searchTxt.getText().equals("")){ //searchDialog.dispose(); if(fileChoose.focus == 1){ fileChoose.tp1.requestFocus(true); str = fileChoose.tp1.getText(); startPosition = str.indexOf(searchTxt.getText()); endPosition = startPosition + searchTxt.getText().length(); fileChoose.tp1.select(startPosition, endPosition); newEndPosition = endPosition; }else if(fileChoose.focus == 2){ fileChoose.tp2.requestFocus(true); str = fileChoose.tp2.getText(); startPosition = str.indexOf(searchTxt.getText()); endPosition = startPosition + searchTxt.getText().length(); fileChoose.tp2.select(startPosition, endPosition); newEndPosition = endPosition; } }

查找下一处

nextTemp = newEndPosition; if(fileChoose.focus == 1){ strAll = fileChoose.tp1.getText(); fileChoose.tp1.select(nextTemp, strAll.length());//选中所有未查找的字符串 nextStr = fileChoose.tp1.getSelectedText(); newStartPosition = nextStr.indexOf(searchTxt.getText()) + nextTemp;//在未查找的字符串中查找对应字符在tp1中的位置 newEndPosition = newStartPosition + searchTxt.getText().length(); fileChoose.tp1.select(newStartPosition, newEndPosition);//找到文本，选择文本 }else if(fileChoose.focus == 2){ strAll = fileChoose.tp2.getText(); fileChoose.tp2.select(nextTemp, strAll.length());//选中所有未查找的字符串 nextStr = fileChoose.tp2.getSelectedText(); newStartPosition = nextStr.indexOf(searchTxt.getText()) + nextTemp;//在未查找的字符串中查找对应字符在tp1中的位置 newEndPosition = newStartPosition + searchTxt.getText().length(); fileChoose.tp2.select(newStartPosition, newEndPosition);//找到文本，选择文本 }

替换

if(fileChoose.focus == 1){ fileChoose.tp1.requestFocus(true); str = fileChoose.tp1.getText(); startPosition = str.indexOf(searchTxt.getText()); endPosition = startPosition + searchTxt.getText().length(); fileChoose.tp1.replaceSelection(replaceTxt.getText()); newEndPosition = endPosition; }else if(fileChoose.focus == 2){ fileChoose.tp2.requestFocus(true); str = fileChoose.tp2.getText(); startPosition = str.indexOf(searchTxt.getText()); endPosition = startPosition + searchTxt.getText().length(); fileChoose.tp2.replaceSelection(replaceTxt.getText()); newEndPosition = endPosition; }

替换下一处

if(fileChoose.focus == 1){ fileChoose.tp1.requestFocus(true); nextTemp = newEndPosition; strAll = fileChoose.tp1.getText();//////////////////////////////// fileChoose.tp1.select(nextTemp, strAll.length());///////////////////////////// nextStr = fileChoose.tp1.getSelectedText(); newStartPosition = nextStr.indexOf(searchTxt.getText()) + nextTemp; newEndPosition = newStartPosition + searchTxt.getText().length(); fileChoose.tp1.select(newStartPosition, newEndPosition); fileChoose.tp1.replaceSelection(replaceTxt.getText()); }else if(fileChoose.focus == 2){ fileChoose.tp2.requestFocus(true); nextTemp = newEndPosition; strAll = fileChoose.tp2.getText(); fileChoose.tp2.select(nextTemp,strAll.length()); nextStr = fileChoose.tp2.getSelectedText(); newStartPosition = nextStr.indexOf(searchTxt.getText()) + nextTemp; newEndPosition =newStartPosition + searchTxt.getText().length(); fileChoose.tp2.select(newStartPosition, newEndPosition); fileChoose.tp2.replaceSelection(replaceTxt.getText()); }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。