Scanner sc = new Scanner(System.in)
System.out.println("单位换算，1 fathom= 1.8288 m (1英寻=1.8288米)")
System.out.println("请输入fathom值（1~10）整数：")
int fathomInt = sc.nextInt()
if(fathomInt >= 1 && fathomInt <= 10){
System.out.println(fathomInt+" fathom = "+(fathomInt*1.8288)+"m")
}else{
System.out.println("请正确输入fathom！")
}
sc.close()
}
运行结果
单位换算，1 fathom= 1.8288 m (1英寻=1.8288米)
请输入fathom值梁茄（1~10）整数：
2
2 fathom = 3.6576m
这两个看你需要哪一个
public static void main(String[] args) {Scanner sc = new Scanner(System.in)
System.out.println("单位换算，1 fathom= 1.8288 m (1英寻=1.8288米)")
System.out.println("请输入fathom值（1~10）整数：")
int fathomInt = sc.nextInt()
if(fathomInt >= 1 && fathomInt <= 10){
System.out.println("Fathom Meter")
for(int i = 0 顷渣渗 i < fathomInt i++){
System.out.println((i+1)+" "+((i+1)*1.8288))
}
//System.out.println(fathomInt+" fathom = "+(fathomInt*1.8288)+"m")
}else{
System.out.println("请正确输入fathom！")
}
sc.close()
}
运行结果
单位换算，1 fathom= 1.8288 m (1英寻=1.8288米)
请输入fathom值雀脊（1~10）整数：
6
Fathom Meter
1 1.8288
2 3.6576
3 5.4864
4 7.3152
5 9.144
6 10.9728
import javax.swing.*import javax.swing.event.*
import java.awt.*
import java.awt.event.*
public class UnitTransfer extends JFrame{
private final int WIDTH = 400, HEIGHT = 300//窗口默认的宽度、高度
private JLabel lblInUnit=new JLabel("输入明埋巧单位")
private JComboBox cboIn=new JComboBox(new String[]{"", ""})
private JLabel lblIn=new JLabel("输入数值")
private JTextField txtIn=new JTextField("10")
private JLabel lblOutUnit=new JLabel("输出单位")
private JLabel lblResult=new JLabel("显示结果")
private JLabel txtResult=new JLabel("结果")
private JComboBox cboOut=new JComboBox(new String[]{"", ""})
private JButton btnTrans = new JButton("转换")
private JButton btnClear = new JButton("清空")
private JRadioButton rdLeng = new JRadioButton("长度")
激键 private JRadioButton rdWeig = new JRadioButton("时间")
private String [] lengthUnit={"米", "分米", "厘米", "毫米"}
private String [] timeUnit={"天", "时", "分", "秒"}
public UnitTransfer(){
super("简单的单位转换器 Beta")
this.setSize(WIDTH, HEIGHT)
this.setLayout(null)
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
ButtonGroup group = new ButtonGroup()
group.add(rdLeng)
group.add(rdWeig)
this.getContentPane().add(rdLeng)
this.getContentPane().add(rdWeig)
this.getContentPane().add(btnTrans)
this.getContentPane().add(btnClear)
this.getContentPane().add(lblIn)
this.getContentPane().add(txtIn)
液游this.getContentPane().add(lblInUnit)
this.getContentPane().add(cboIn)
this.getContentPane().add(lblResult)
this.getContentPane().add(txtResult)
this.getContentPane().add(lblOutUnit)
this.getContentPane().add(cboOut)
this.setVisible(true)
this.doLayout()
btnTrans.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
doConvert()
}
})
btnClear.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
txtIn.setText("0")
txtResult.setText("0")
}
})
rdLeng.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
cboIn.setModel(new DefaultComboBoxModel(lengthUnit))
cboOut.setModel(new DefaultComboBoxModel(lengthUnit))
}
})
rdWeig.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
cboIn.setModel(new DefaultComboBoxModel(timeUnit))
cboOut.setModel(new DefaultComboBoxModel(timeUnit))
}
})
rdLeng.setSelected(true)
cboIn.setModel(new DefaultComboBoxModel(lengthUnit))
cboOut.setModel(new DefaultComboBoxModel(timeUnit))
}
final int offX=100
public void doLayout(){
super.doLayout()
rdLeng.setBounds(offX, 15, 60, 20)
rdWeig.setBounds(rdLeng.getX()+rdLeng.getWidth()+5, 15, 60, 20)
lblInUnit.setBounds(offX, rdLeng.getY()+rdLeng.getHeight()+20, 80, 20)
cboIn.setBounds(lblInUnit.getX()+lblInUnit.getWidth()+5, lblInUnit.getY(), 80, 20)
lblIn.setBounds(offX, lblInUnit.getY()+lblInUnit.getHeight()+5, 80, 20)
txtIn.setBounds(lblIn.getX()+lblIn.getWidth()+5, lblIn.getY(), 80, 20)
lblOutUnit.setBounds(offX, lblIn.getY()+lblIn.getHeight()+30, 80, 20)
cboOut.setBounds(lblOutUnit.getX()+lblOutUnit.getWidth()+5, lblOutUnit.getY(), 80, 20)
lblResult.setBounds(offX, cboOut.getY()+cboOut.getHeight()+5, 80, 20)
txtResult.setBounds(lblResult.getX()+lblResult.getWidth()+5, lblResult.getY(), 100, 20)
int w=getWidth ()
int x=(w-70*2-5)/2//水平居中
btnTrans.setBounds(x, lblResult.getY()+lblResult.getHeight()+30, 70, 25)
btnClear.setBounds(btnTrans.getX()+btnTrans.getWidth()+3, btnTrans.getY(), 70, 25)
}
public void doConvert(){
double v=0
try{
v= Double.parseDouble(txtIn.getText())
}catch(Exception ex){
txtIn.setText("0")
return
}
//"米", "分米", "厘米", "毫米"
if(rdLeng.isSelected()){
switch(cboIn.getSelectedIndex()){
case 0:
break
case 1:
v=v/10
break
case 2:
v=v/100
break
case 3:
v=v/1000
break
default:
return
}
//v 现在是标准单位：米
switch(cboOut.getSelectedIndex()){
case 0:
break
case 1:
v=v*10
break
case 2:
v=v*100
break
case 3:
v=v*1000
break
default:
return
}
if(v<0.01){
txtResult.setText(String.format("%2.8f", v))
}else{
txtResult.setText(String.format("%2.2f", v))
}
}else{
//"天", "时", "分", "秒"
switch(cboIn.getSelectedIndex()){
case 0:
v=v*24
break
case 1:
break
case 2:
v=v/60
break
case 3:
v=v/3600
break
default:
return
}
//v 现在是标准单位：小时
switch(cboOut.getSelectedIndex()){
case 0:
v=v/24
break
case 1:
break
case 2:
v=v*60
break
case 3:
v=v*3600
break
default:
return
}
if(v<0.01){
txtResult.setText(String.format("%2.8f", v))
}else{
txtResult.setText(String.format("%2.8f", v))
}
}
}
public static void main(String[] args){
EventQueue.invokeLater(new Runnable() {
public void run() {
new UnitTransfer()
}
})
}
} //请参考，欢迎指正
public class Test {public double change(double bang) {
double kg = bang * 0.454
return kg
}
public static void main(String[] args) {
Test test = new Test1()
double bang = 5.23
double kg = test.change(bang)
System.out.print(kg)
}
}
/桥行庆/好简单的程序，敏握你要自己编带旁~
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