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jtextareaから入力を受け取り、入力から複数の行を読み込んで計算を出力できる必要があります。私は最初の行を読むことができますが、それ以降は何もありません（クラッシュします）。ここで私が持っているコードは、今ここでJava - jtextareaで複数の行を読み込む。 char配列に変換する
String exp = inputTextArea.getText();
String[] lines = exp.split("\\n");
for (int i = 0; i < lines.length; i++)
{
InterpObj.p = exp.toCharArray();
InterpObj.counter = 0;
double nr = InterpObj.E();
String str=Double.toString(nr);
outputTextArea.append(" " +str);
}
は、エラーメッセージがInterpreter.Eで私はあなたがあなたのInterpreter.E()方法を確認するべきだと思い
{Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "6 12"
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.lang.Double.parseDouble(Double.java:538)
at Interpreter.A(Interpreter.java:43)
at Interpreter.E(Interpreter.java:24)
at Interp_1a$ButtonListener.actionPerformed(Interp_1a.java:91)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6525)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6290)
at java.awt.Container.processEvent(Container.java:2234)
at java.awt.Component.dispatchEventImpl(Component.java:4881)
at java.awt.Container.dispatchEventImpl(Container.java:2292)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
at java.awt.Container.dispatchEventImpl(Container.java:2278)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4703)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
インタープリタクラスのある時点で、あなたは1つの 'double'に変換しようとしています。それはそのようには機能しません。スペースで文字列を分割するか、各行に1つの数字だけを入力します。補足として、 'InterpObj.p = exp.toCharArray（）;'が実際には 'InterpObj.p = lines [i] .toCharArray（）;' – jonhopkins
であるべきかどうか疑問に思います。ありがとうございました！！ @jonhopkins –